Sunday, October 31, 2010
Wednesday, September 22, 2010
System restart when CD/DVD disk is inserted on the player
Have you ever encounters a system that restarts whenever you insert a CD/DVD disk on its player? If not then this solution might help you solve the problem right away.
The situation is that the unit functions normally, except when you insert a disk on the player, at first you suspect that it’s a problematic OS, the CD/DVD player is problematic or the system is infected with a virus.
Before you spent hours in troubleshooting the problem, I suggest that you try replacing the power supply of your system, I have encounter a few problems of this kind that point to a problematic power supply unit(on other cases Windows hang-up or system keeps on resetting), especially if it is a not a branded one.
The explanation maybe to the problem, is that power supply unit cannot meet the needed current supply of the CD/DVD player, when it tries to initialize. That is why I mentioned on my other post regarding how valuable to spent a few bucks in purchasing a branded a power supply unit for your CPU
The situation is that the unit functions normally, except when you insert a disk on the player, at first you suspect that it’s a problematic OS, the CD/DVD player is problematic or the system is infected with a virus.
Before you spent hours in troubleshooting the problem, I suggest that you try replacing the power supply of your system, I have encounter a few problems of this kind that point to a problematic power supply unit(on other cases Windows hang-up or system keeps on resetting), especially if it is a not a branded one.
The explanation maybe to the problem, is that power supply unit cannot meet the needed current supply of the CD/DVD player, when it tries to initialize. That is why I mentioned on my other post regarding how valuable to spent a few bucks in purchasing a branded a power supply unit for your CPU
Bad CMOS Battery may cause unusual Windows problem
The units are Pentium III and a Pentium IV, both units has drained CMOS battery. The problem I encountered is that Windows XP hangs up at start up if you just bypass the CMOS bad error by pressing F1 upon turned on.
It took me sometime to figure out what is the problem, I even mistaken it as a software problem, but later I discovered this thing happen if you bypass CMOS setup at startup without particularly setting up the date, I don’t really know exactly what cause it, maybe BIOS has problem interacting with Windows if date is not properly set.
It took me sometime to figure out what is the problem, I even mistaken it as a software problem, but later I discovered this thing happen if you bypass CMOS setup at startup without particularly setting up the date, I don’t really know exactly what cause it, maybe BIOS has problem interacting with Windows if date is not properly set.
PC cannot establish network connectivity!
I just want to discuss a particular network problem I encounter just recently, it's actually an additional connection to the router, the cable is just newly bought and crimped from the store.
The problem encountered is when you plugged the cable, network icon indicates a limited connectivity and shows an exclamation point. It took me sometime to trouble shoot the problem, but later I found out that CAT5 cable is not crimped based on standard configuration.
The hard part in identifying the problem is that LAN cable is newly purchased so it's the least you suspect.In case you encounter similar problem described above, try to inspect the connector visually or adjust network connection properties to 10 mbps full duplex(default setup is auto), if PC established network connectivity then it's confirmed that connector was not crimped in accordance to standards.
It is important than you observe proper cable configuration when crimping new connections to ensure a problem-free network.
Standard CAT5 LAN connector configuration:
The problem encountered is when you plugged the cable, network icon indicates a limited connectivity and shows an exclamation point. It took me sometime to trouble shoot the problem, but later I found out that CAT5 cable is not crimped based on standard configuration.
The hard part in identifying the problem is that LAN cable is newly purchased so it's the least you suspect.In case you encounter similar problem described above, try to inspect the connector visually or adjust network connection properties to 10 mbps full duplex(default setup is auto), if PC established network connectivity then it's confirmed that connector was not crimped in accordance to standards.
It is important than you observe proper cable configuration when crimping new connections to ensure a problem-free network.
Standard CAT5 LAN connector configuration:
Just another LAN problem with a twist
Its another busy week, one problem I encounter that I want to post here is about a LAN connection problem on a problematic RJ45 connection.
The problem indicates a no connectivity even if LAN cable is inserted(take note that this is a previously working connection), on the first look of the situation there are possible scenarios that may have caused it, it maybe cause by problematic LAN cable or RJ45 connection,a LAN card problem or perhaps a software problem.
The first thing I did is checked and re-crimped(without replacing the connector) both ends of the LAN cable(visually connection looks fine) but problem still the same. I go ahead on replacing a different LAN card(PC is using a PCI LAN card), when I rebooted the system it detects the new hardware and load the corresponding driver but still a no connectivity exist. What else is left, a cable or a software problem? this will requires a lot of work if I will replaced either of the two, so I look for other ways to confirmed the problem.
Before I continue, I just want to add more info about this particular problem, the problem occurs after the two PC has switched location.The reason I include this fact because this will be bring twist to the problem. I re-inserted that problematic cable to another PC, it's actually the one being previously switched and to my big surprise the connection did work fine.
I re-insert both PCI LAN card to the other PC, still no connectivity exist. The LAN device used on the particular PC where the particular connection work is on board(strange?), I replaced both RJ45 connectors on the problematic connection and connectivity backs to normal.
Conclusion
A not so good RJ45 connection exists from the very beginning the LAN cable was installed its just it works on the original PC which is using an on board LAN, the problem was only discovered when the user switched PC.
The problem indicates a no connectivity even if LAN cable is inserted(take note that this is a previously working connection), on the first look of the situation there are possible scenarios that may have caused it, it maybe cause by problematic LAN cable or RJ45 connection,a LAN card problem or perhaps a software problem.
The first thing I did is checked and re-crimped(without replacing the connector) both ends of the LAN cable(visually connection looks fine) but problem still the same. I go ahead on replacing a different LAN card(PC is using a PCI LAN card), when I rebooted the system it detects the new hardware and load the corresponding driver but still a no connectivity exist. What else is left, a cable or a software problem? this will requires a lot of work if I will replaced either of the two, so I look for other ways to confirmed the problem.
Before I continue, I just want to add more info about this particular problem, the problem occurs after the two PC has switched location.The reason I include this fact because this will be bring twist to the problem. I re-inserted that problematic cable to another PC, it's actually the one being previously switched and to my big surprise the connection did work fine.
I re-insert both PCI LAN card to the other PC, still no connectivity exist. The LAN device used on the particular PC where the particular connection work is on board(strange?), I replaced both RJ45 connectors on the problematic connection and connectivity backs to normal.
Conclusion
A not so good RJ45 connection exists from the very beginning the LAN cable was installed its just it works on the original PC which is using an on board LAN, the problem was only discovered when the user switched PC.
PC Turns On When Power Is Plugged In!
Have you ever encountered a system that automatically turns on, when power was just plugged-in in your AC outlet or the AVR was just turned on? Well this may be the same case I experience weeks ago.
Its a socket 775 MOBO, actually the brand is Asrock! I was troubleshooting an intermittent unit, I notice that when I turned on the AVR, the unit automatically turns on and it display a CMOS battery bad. Although the system works just normally(except for the time and date), it is not just normal. So I replaced the CMOS battery, and to my surprise the unit does not turned on automatically anymore,the system now turns on via its switch, therefore the previous problem was caused by a drained CMOS battery.
Strange problem can sometime remedied on an unexpected manner, that's what makes my profession challenging, you will encounter unusual problem all the time.
That's all folks, until on my next post and belated happy new year to all!
Its a socket 775 MOBO, actually the brand is Asrock! I was troubleshooting an intermittent unit, I notice that when I turned on the AVR, the unit automatically turns on and it display a CMOS battery bad. Although the system works just normally(except for the time and date), it is not just normal. So I replaced the CMOS battery, and to my surprise the unit does not turned on automatically anymore,the system now turns on via its switch, therefore the previous problem was caused by a drained CMOS battery.
Strange problem can sometime remedied on an unexpected manner, that's what makes my profession challenging, you will encounter unusual problem all the time.
That's all folks, until on my next post and belated happy new year to all!
Installation tip when installing device drivers on a fresh formatted PC!
I have notice that during installation of device drivers on a new PC(mostly IBM PC compatible),you always have to restart for each driver that the software install(bundled software with your motherboard).To save some time, instead of restarting you can just click "I will restart later...", then click start > click logoff instead of shutdown> click logoff again> and click the user that appears on the screen and you will redirected back to your desktop and it will continue installing the next driver.Repeat the process until all drivers are installed.
Note: This procedure is also applicable even if you are simply loading a device driver on your PC
Note: This procedure is also applicable even if you are simply loading a device driver on your PC
Bulging capacitors on your motherboard!
The next topic that I would like to discuss in troubleshooting is how a bulging filter capacitor(s) on your motherboard mess up your troubleshooting work. Capacitors that is mounted on your motherboard are called filter capacitors(refer to image), this type of capacitors are called electrolytic capacitors. The purpose of this capacitors is to smoothen the voltage within a particular circuitry, you can see lots of this beside the area of your microprocessor. As time passes some of these capacitors pops up causing an unfiltered voltage within your system, thereby making the motherboard to perform strangely. Some of the common problems you will encounter if you have a bulging filter capacitors are, system blackout ; resets intermittently; blue screen or system hangs-up while in the middle of your work.Often times this problems(except on blackout) are mistaken as a software problems prompting you to format your hard drive and later you found out that its not the software that is causing the problem. If you encounter problems I mentioned above, I suggest that inspect first the physical conditions of your motherboard filter capacitors before you reformat your hard disk, it may save a lot of time in your trouble shooting. If bulging capacitors are just too many, more often you will have a system black-out. Replacing bulging capacitors on your mother board will sometime do the fix but its a tedious process, motherboard replacement will be a lot easier but expensive. You decide what is best for you or to your customer.
Note:Filter capacitors are black tubes like shapes with silver on top; the appearance on top of this capacitors should be flat and clean otherwise its a already defective.(Please refer to the image above- the capacitors at the right are the good ones)
Helpful tweaks on Windows XP !
This tweaks will not make your PC runs so fast, but it may help in improving Windows performance.
1. Speed up showing of your start menu by doing the following changes of your registry. Go to the Registry key HKEY_Current_User\Control Panel\Desktop\Menu Show Delay the default is 400. Set it to your desired value, the lower the value the faster the menu will show.
2. Setting your Windows Kernel to run via RAM by setting the DisablePageExecutive DWORD value to 1. EditRegistry key Hkey_Local_Machine\System\CurrentControlSet\Control\Session Manager\Memory Management\DisablePagingExecutive to 1 to disable paging and have the kernel run in RAM. Remember, any applications will run faster in RAM compare in a Hard drive or a virtual memory. After making the tweak, exit registry and restart windows. Take note that do this procedure only if your system has a 256 MB or higher RAM.
3. Disable the 8.3 naming convention in Windows XP,expert says that this naming convention can degrade NTFS drive performance, unless you are still using a 16 bit applications dont perform this tweak. Set the Registry DWORD Key Hkey_Local_Machine\System\CurrentControlSet\Control\FileSystem\ntfsdisable8dot3NameCreation to1.Exit and Restart.
Reminder: Back-up registry before you perform the following tweaks, so that you can reverse to an earlier state in case something happen.
What is PHISHING?
Since the internet becomes so popular all around the world, an era of the so called cyber criminals was also born and until now it continue to mess on someone's online activities. In fact as individuals, banks, private establishments and government institutions relying more often and doing business via the internet, cyber criminals also grows its numbers.And inspite strict measures in certain countries to go after these criminals, still its not enough to stop these people from committing such crime. One cyber crime I would like to discuss in particular is called Phishing(in case you dont know).
Phishing is the act of sending an e-mail to a user falsely claiming to be an established legitimate enterprise in an attempt to scam the user into surrendering private information that will be used for identity theft. The e-mail directs the user to visit a Web site where they are asked to update personal information, such as passwords and credit card, social security, and bank account numbers, that the legitimate organization already has. The Web site, however, is bogus and set up only to steal the user’s information.
One example of this is my own experience, at one time I received an email from the admin of Yahoo(as to what I know that time) saying that congratulations you are one of those who win on our daily raffle worth $500 to claim the price please click on the link, if you still don't know what is phishing all about, you will really say that's the email is genuine and and you will jump to click on the link.After clicking the link it opens a site that resembles just like yahoo, and it will instruct you to further click on the link to claim you price via an e-currency company(if you have one, otherwise you will be obliged to open an account) and the last part just about you are finish transferring the $500, another message pops-up saying that you are not yet a premium member of Yahoo games and you have to register in order to claim your price, the cost is just a little over $8 so you will not suspect thats its a hoax, you will pay the said subcription price and found out later that no $500 goes to your account, and its just a work of a phisher but I thank God I only lost 8$. Phishers can steal password and user name to a site that you log-in regularly even in a Friendster or Yahoo mail account. Lots of E-bay members was also victimized by these phishers.
If you received an email, requiring you to upgrade your password, user name or something dont act on it, call or email the involve company to verify if it comes from them.Normally legitimate businesses will not let there members upgrade vital information via an email link, especially if password and user name are involve. You can also verify the given link on a domain verification site like http://www.hungryhackers.co.cc , in most cases it will give you the details of the particular link.
In IE7 there is already anti phishing features, while Opera and Firefox will warn you if the site you are about to open is not safe or bogus.
Phishing is the act of sending an e-mail to a user falsely claiming to be an established legitimate enterprise in an attempt to scam the user into surrendering private information that will be used for identity theft. The e-mail directs the user to visit a Web site where they are asked to update personal information, such as passwords and credit card, social security, and bank account numbers, that the legitimate organization already has. The Web site, however, is bogus and set up only to steal the user’s information.
One example of this is my own experience, at one time I received an email from the admin of Yahoo(as to what I know that time) saying that congratulations you are one of those who win on our daily raffle worth $500 to claim the price please click on the link, if you still don't know what is phishing all about, you will really say that's the email is genuine and and you will jump to click on the link.After clicking the link it opens a site that resembles just like yahoo, and it will instruct you to further click on the link to claim you price via an e-currency company(if you have one, otherwise you will be obliged to open an account) and the last part just about you are finish transferring the $500, another message pops-up saying that you are not yet a premium member of Yahoo games and you have to register in order to claim your price, the cost is just a little over $8 so you will not suspect thats its a hoax, you will pay the said subcription price and found out later that no $500 goes to your account, and its just a work of a phisher but I thank God I only lost 8$. Phishers can steal password and user name to a site that you log-in regularly even in a Friendster or Yahoo mail account. Lots of E-bay members was also victimized by these phishers.
If you received an email, requiring you to upgrade your password, user name or something dont act on it, call or email the involve company to verify if it comes from them.Normally legitimate businesses will not let there members upgrade vital information via an email link, especially if password and user name are involve. You can also verify the given link on a domain verification site like http://www.hungryhackers.co.cc , in most cases it will give you the details of the particular link.
In IE7 there is already anti phishing features, while Opera and Firefox will warn you if the site you are about to open is not safe or bogus.
One of my most unforgettable moments in pc servicing?
The year is 1997 and I am just starting on my new job in one of the leading IT companies in our country, one of my task that day is to replace a not fully functional keyboard in one of our clients. The company is one of the biggest tire manufacturer at that time and the unit was an Acer Pentium 1 CPU used to run their company's quality assurance software. Considering the degree of work to be done I am not expecting I will experience some problems on that particular task.
When I arrive on site, the unit is turned on and its running the application mentioned above. One of the QA engineer informed me that they cannot shot down the unit because they are running some tests and it will take some time before the tests is done. Since I cannot wait all day long, I suggested that I will just pull out the old keyboard and plug-in the new one while the unit is turned on. At first they are hesitant, but after consulting in one of their in-house programmer they let me do the thing.
Technically speaking it is possible that you unplugged and plugged keyboard even if CPU is turned on(but not safe if CPU is performing a task) , so I am confident that everything will be just fine. So I unplugged the old keyboard and plugged the new one but after the new keyboard is plugged, the system hangs-up and I started to feel nervous. The operation was halted and I have no choice but to restart the system, but the worst is yet to come because after restarting, the system already indicates a disk boot failure and later I found out that the hard drive crashed and all their precious data is gone. The department supervisor got mad at me claiming that they have no back-up of that application and it will be difficult to rebuild the database. Later I was brought to their IT manager for questioning and threatened to have me pay any loses I have made. I explained my side and insists that I was given a go signal in one of his staff.
Finally, after almost 3 hours of questioning and redundant explanations I was allowed to left, with the promise that I will do everything to recover the data. The next day I was called by my Department Manager to hear my side and after hearing my explanations I was freed from any liability, but he emphasized that next time I have to be extra careful in dealing PC's that runs application with very important functions.
I tried everything to rejuvenate the disk but to no avail, it was a Seagate 540MB hard drive and base on records at that time, that particular model is sensitive on a lot of factors and often problematic. I may point it to an ailing hardware but still I have to accept the blame considering I may have triggered the whole situation.The company was forced to replace the defective hard drive for free and I was lucky that it was not deducted on my payday.
The lesson learned here is doing some shortcuts can sometime brings us trouble and if you are not willing to take the risk, just perform the proper way to avoid disaster.
When I arrive on site, the unit is turned on and its running the application mentioned above. One of the QA engineer informed me that they cannot shot down the unit because they are running some tests and it will take some time before the tests is done. Since I cannot wait all day long, I suggested that I will just pull out the old keyboard and plug-in the new one while the unit is turned on. At first they are hesitant, but after consulting in one of their in-house programmer they let me do the thing.
Technically speaking it is possible that you unplugged and plugged keyboard even if CPU is turned on(but not safe if CPU is performing a task) , so I am confident that everything will be just fine. So I unplugged the old keyboard and plugged the new one but after the new keyboard is plugged, the system hangs-up and I started to feel nervous. The operation was halted and I have no choice but to restart the system, but the worst is yet to come because after restarting, the system already indicates a disk boot failure and later I found out that the hard drive crashed and all their precious data is gone. The department supervisor got mad at me claiming that they have no back-up of that application and it will be difficult to rebuild the database. Later I was brought to their IT manager for questioning and threatened to have me pay any loses I have made. I explained my side and insists that I was given a go signal in one of his staff.
Finally, after almost 3 hours of questioning and redundant explanations I was allowed to left, with the promise that I will do everything to recover the data. The next day I was called by my Department Manager to hear my side and after hearing my explanations I was freed from any liability, but he emphasized that next time I have to be extra careful in dealing PC's that runs application with very important functions.
I tried everything to rejuvenate the disk but to no avail, it was a Seagate 540MB hard drive and base on records at that time, that particular model is sensitive on a lot of factors and often problematic. I may point it to an ailing hardware but still I have to accept the blame considering I may have triggered the whole situation.The company was forced to replace the defective hard drive for free and I was lucky that it was not deducted on my payday.
The lesson learned here is doing some shortcuts can sometime brings us trouble and if you are not willing to take the risk, just perform the proper way to avoid disaster.
Proper Approach In PC Troubleshooting
Today I will discussed some troubleshooting approach that may help shorten your time in solving/isolating a particular PC problem.
Based on experience, I often encountered problems that seems a major problem when its not.
An example of this is a blackout motherboard only to find out that cmos enable switch is wrongfully set or there is no jumper inserted on the CMOS enable switch.
Another example is that you just transfered your PC in a different location, and when you plug everything you got a non responsive unit or PC on a continues reset, only to find out that PC was wrongfully inserted on the 110V power source, instead on the 220V outlet.
There are other scenarios that you will encounter in troubleshooting a particular problem, but with the right approach you can shorten the time in your troubleshooting.
Listed below are my basic approach in PC troubleshooting,
1.Talk to the user first what he/she noticed before the PC bogged down, often it will perform strangely, it this way you may have a hint to were you start your troubleshooting.
2.Try to establish if the problem cause by a software or a hardware, in this way you can cut half of your time in troubleshooting.
3.Look for minor cause of a particular problem first before digging deeper unto it, you may wrongfully reformat a PC that intermittently resets but later you found out that its just a case of poor memory contact on its slot or a clogged processor heatsink.
Thats all for now folks, I hope this particular topic help enhance your troubleshooting skills!
Based on experience, I often encountered problems that seems a major problem when its not.
An example of this is a blackout motherboard only to find out that cmos enable switch is wrongfully set or there is no jumper inserted on the CMOS enable switch.
Another example is that you just transfered your PC in a different location, and when you plug everything you got a non responsive unit or PC on a continues reset, only to find out that PC was wrongfully inserted on the 110V power source, instead on the 220V outlet.
There are other scenarios that you will encounter in troubleshooting a particular problem, but with the right approach you can shorten the time in your troubleshooting.
Listed below are my basic approach in PC troubleshooting,
1.Talk to the user first what he/she noticed before the PC bogged down, often it will perform strangely, it this way you may have a hint to were you start your troubleshooting.
2.Try to establish if the problem cause by a software or a hardware, in this way you can cut half of your time in troubleshooting.
3.Look for minor cause of a particular problem first before digging deeper unto it, you may wrongfully reformat a PC that intermittently resets but later you found out that its just a case of poor memory contact on its slot or a clogged processor heatsink.
Thats all for now folks, I hope this particular topic help enhance your troubleshooting skills!
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