Faulty CPU, PSU or Motherboard?

May 30, 2011 at 02:59:08
Specs: Windows 7, Phenom II X2 550
Hi guys, first question here.

A few weeks ago, I was taking out my Graphics card (due to selling) and noticed I had accidently left my pc on for a few days. Sure this would be fine however the thermal paste I had was old, and I did not replace it after replacing my CPU to an AMD Phenom II X2 550 BE about 2 months earlier. After putting an old GPU back into the system after taking the one I had out, the computer would turn on, all fans runnning including the graphics card fan, all HDDs worked as well as DVD drive tray functioning properly.. however no picture on screen.

I automatically thought; Graphics card, so went ahead in ordering a brand new 8800GT (yes it was manufacture refurbished, got it for $50 but was new in the box with everything, made by zotac.) Installed the card this morning, all was fine, picture came back to the screen, installed drivers, happy days.

Until I got home this afternoon. Turned the computer on, it posted, reached bios check screen and then the picture disappeared. Same problem I had. The computer turns on, all fans (including cpu heat sync) and lights come on, but just no picture.

Is this a CPU problem? I took it out and noticed it had a bent pin, somehow. I was fiddling with it, trying to bend it back when I worsened the problem and the whole pin came off.. R.I.P cpu.

Is it worth getting a new CPU? Or is it another system component which is preventing the computer to post at all.

See More: Faulty CPU, PSU or Motherboard?

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May 30, 2011 at 07:52:15
Your explanation is a mess. It would help if you'd list your system specs & include the models of all the video cards you've been messing with. It would also help if you'd list things in the order that you did them. The 8800GT is a powerful card & needs a decent power supply - please list the make/model, wattage & amperage specs of your current PSU.

A few comments:

1. you MUST reapply thermal paste whenever a heatsink is removed the CPU. Thermal paste should NOT be re-used. Remove the heatsink, clean off ALL traces of the old thermal paste from the top of the CPU & bottom of the heatsink, then apply a tiny dab of paste in the center of the CPU. Do NOT spread it around! Just set the heatsink in place & lock it down, that's all there is to it. Here's what it should look like:



NOT LIKE THIS: http://www.capn13.net/it/cpu_mounti...

2. I don't get your point about leaving the system on for a few days? Some people never shut their system down. I don't see where it's a problem unless you did something stupid like remove the video card while the system was still plugged in & running?

3. And what did you think you'd accomplish by removing the CPU & looking at it? If the system was working, the CPU was good. But since you broke a pin off, you destroyed it. There is no way to repair a broken pin. Throw the CPU in the trash & buy a new one for about $100. Expensive lesson.

4. Find someone else to work on your comptuer from now on. You obviously don't possess the required skills to do it yourself.

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May 30, 2011 at 07:56:26
"I was taking out my Graphics card (due to selling) and noticed I had accidently left my pc on for a few days" Next time u have to be careful, remove the power cord when u want mess with hardware.
Did u remember checking CPU temperature? Are sure the psu can handle 8800GT(post the psu specs)? Do u hear beeps when u start the system?
Not all of the CPU legs are important(some are there to make sure the CPU fit well in the socket), If the broken leg is important the CPU will not work.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.

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May 30, 2011 at 08:01:40
With the currrent track record you have, I would buy a Dell or Apple.

With electrical equipment, there are processes that must be followed to insure component integrity. Commitment to detail is a must. No shortcuts or risk loosing the entire hardware system.

I assume the pin on the CPU was bent after you removed it from the system. Easy to do. As long as the CPU is in a socket, the pins are safe. <<< Note
If you want to check the rest of the system, you need a good, 'test' CPU. You may loose it in the test process. In your opinion, is that worth the risk / loss?

Use google and read instructions on replacing the CPU and heatsink. The cpu will shut down if it detects overheating, which could be caused by improper heat sink installation. If the system is left on, it can destroy other components.

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Related Solutions

May 30, 2011 at 09:25:23
Did you even shut down the computer and unplug it BEFORE removing the graphics card?

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August 25, 2011 at 06:16:27
I had a similar problem with an Socket A PC, I changed the graphics card ( from an AGP to a Matrox millennium 8MB PCI), the hard drive, the mem from 2 GB to 256MB, and still Window XP pro would not install and would only copy files into the mem at the installation stage, and would show a BSOD as soon as it atempted to access the drive to install

the error stop code:-
stop: was 0x0000008E (0xc0000005, 0x0799E3892, 0xF959DA1C)

It wasn't untill I replaced the 3GB barton Athlon CPU for a 1 GB duron CPU that windows would install! and will now boot up OK!

Before that I would install winXP pro onto a drive in another PC then would place this drive into the above PC, After the OS had updated its drivers etc, it would run but it would unexplained re-boot while using the PC showing a BSOD for a split second as it did so, also hard drive now and again would be checked for errors at reboots and corrected, also lockups were happening!

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August 25, 2011 at 06:35:07
Further to my previous post the Motherboard is a Epox 8KRA2 and supports Barton CPU's upto
3200 and mem DDR upto 3 GB cpu setting would have been 166/33 clock multiplier 13x for Barton 3000+ The AGP card is a MSI 8912.

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