Intermittent video card boot problems.

September 8, 2012 at 10:38:16
Specs: Ubuntu 12.04.1, Intel® Pentium(R) 4 CPU 3.40GHz × 2 / 2GB RAM
Im running an Nvidia GeForce 7600GS (512Mb AGP) on a P4M80-M4 Motherboard. When i start the PC, the lights and fans fire up just like a normal boot. However, the display wont wake from sleep, and when i turn it on manually, there is still no signal. This might happen after 3 or 4 pc restarts, along with switching to and from onboard video by disconnecting the video card, restarting,etc until it finally grabs the signal. And even then, one of three things happen (no beep codes) :
1. system freeze during POST
2. between the NVIDIA black boot screen showing the video card info and when the POST is supposed to come up, it loses the signal and requires another restart.
3.Everything runs normally.

*Im running Ubuntu 12, but i have a feeling this is a hardware issue. Once i get to my OS everything runs just fine, even the video card. Any suggestions?

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September 13, 2012 at 03:43:17
Just a quick suggestion, sometimes when CPU is very hot (typically P4 i believe) it will refuse to boot until it cools down.

you may want to check your CPU heatsink/fan and check if there is a build up of dust, you may also want to change the thermal paste to something like Arctic Silver 5.

believe it or not someone recently had the same issue with an ASUS P4V800-X motherbaord with a P4 processor. After every shutdown he had to wait a while to reboot the machine, he often tried about 10 times unsuccessfully. however when it cooled down it booted.

I immediately checked the heatsink and it was clogged up with dust and mega hot to the touch.

cleaned up, replaced thermal grease.

boots everytime.

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September 13, 2012 at 05:42:19
Prepare a Puppy Linux disk and boot from that directly. If there are not problems, it is a driver issue. If it has the same problem, it is a hardware issue. Also check BIOS settings on the Video (AGP?) to make sure that it is not set wrong or has changed.
If hardware:
Remove and reseat the video card 2 or 3 times to rub the contacts clean.
Try another power supply that you know is good and has enough power to support the system with that video card.
Remove the video card and try onboard video and if available, another video card that is known to be good.

You have to be a little bit crazy to keep you from going insane.

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