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I have a very weird hardware problem (I assume), my computer crashes sometimes when it is running. This is not the most weird part, when I boot the computer the GRUB 2.0 boot loader is displayed. After passing the boot loader and booting Windows 7 or Ubuntu 10.10 it crashes.

After several attempts it boots and works correctly (most of the time). So, my first solution was to create a delay in the GRUB boot loader because it seemed that it needed some time to "warm-up". Now, the problem is worse and I should add an addition delay to the GRUB boot loader.

  • The computer needs time to "warm-up"
  • If it is "warm" the computer crashes at the login screen of Ubuntu and Windows
  • Sometimes it crashes when I got it to run, but no logic found here
  • The computer never crashed at the GRUB bootloader
  • Memory tests didn't found any problems
  • The values of the power seem to be correct
  • Temperatures seems to be okey aswell.
  • I replaced the videocard

Any ideas?

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migrated from Sep 26 '11 at 15:11

This question came from our site for system and network administrators.

Can you boot to a live CD? Have you pulled and re-seated all cards and memory? – N4TKD Sep 26 '11 at 15:25
Check the capacitors on the motherboard for swelling and bulging, it can also be a bad PSU. – Moab Sep 26 '11 at 16:13
@JohnDR the live CD gives the same result, crash at the login screen. – Roel Veldhuizen Sep 26 '11 at 16:58
@Moab, is there a way to log the PSU voltages? – Roel Veldhuizen Sep 26 '11 at 16:58
Not that I know of, If I eliminate everything else, I replace the PSU. – Moab Sep 26 '11 at 20:02
up vote 0 down vote accepted

Easiest way is what JohnDR says and try booting to a disk and see if that does something different, that will tell you hardware or software.

If it still fails, I would test the PSU first, as it is easiest to test.

If you have a second system and no boot disc. Pull the boot drive and put in a different machine. Even with no drivers for the different hardware Windows 7 should load. If it loads look at your Board/Processor/PSU. If it fails look at your software.

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There are a number of software apps that will measure PSU voltages but they all run in Ubuntu or Windows, they are not boot programs. If you are going to test voltages get a Volt meter and have some fun. you should be able to find acceptable levels for your PSU on the web. – MaskedPlant Sep 27 '11 at 15:11

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