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Laptop BIOS hangs
Posted 23 April 2014 - 09:24 PM
If the BIOS does not hang, and starts booting into Windows XP, which happens about 1 in 5 attempts, the system is completely stable under load. I can hear the hard drive powering up and seeking, so it's not that the system is failing to read from disk.
To find the cause of the problem I have so far:
- reset BIOS to defaults, confirming that it really happened
- disconnected all peripherals and cables
- disconnected the hard drive
- removed either one of the two memory modules
- disconnected the WLAN radio
The BIOS would always hang in diferent stages. Sometimes on device enumeration, sometimes right after entering setup. I was able to restore essential settings one by one.
I am in peace if the machine is dead. I'm just kinda curious how is it that it can work in Windows stable in this condition.
Posted 24 April 2014 - 02:14 PM
Or try to flash the BIOS, or better replace the BIOS chip with a new one, flashed with the latest BIOS you can find. Sounds like a bad chip that sometimes can't be read. Other than that I can only say it's a now faulty motherboard, hard to say why...
Posted 24 April 2014 - 07:47 PM
Posted 28 April 2014 - 12:33 AM
The CMOS battery tested good. Battery was wrapped in a black plastic with wires, and since it was good, I didn't replace it. Resetting the CMOS by disconnecting the battery and shorting the leads also did not resolve the issue. For the first time the computer reported a CMOS checksum error. I managed to adjust only two settings, and they were preserved.
It is quite possible that the motherboard is faulty because some oxidation from a liquid could be seen on it. Soldering a chip however is way beyond my skill level.
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