Asus A7N8X ver. 2.00 purchased November 2003, Bios version 1006
AMD XP2500 Barton
1 GB (2 x 512MB) Mushkin L2 DDR
ATI AIW 8500
Soundblaster Live Platinum
Antec TruePower 420 Watt
Has been running great until today.
I intended to intall a new heatsink/fan. So I went online for a while before starting the work. Before powering down the PC, I wanted to drop my FSB to 100 before I installed the new heatsink. I figured I could more safely verify the installation after it gets done if I start off with a lower FSB. So I restarted the PC and hit DEL at the POST. Changed the FSB to 100 and did a "Save and Exit". Let the PC restart but it would not POST! Power light is on. Hard drive light is lit up. Fans are running. Monitor light is flashing like there is no video signal. Uh-oh.
So I powered down and cleared the CMOS (jumper to 2-3 then back to 1-2). Powered back up and the computer showed the POST screen. Showed a Checksum error after the memory check and gave the options of F1 to continue or F2 to go into the bios. I chose F2 and tried "Load Optimal Settings", tried the FSB at 166, "Save Settings" then "Save and Exit". PC re-booted but once again, NO POST.
I cleared the CMOS again, went into BIOS, changed nothing, tried "Save Settings" then "Save and Exit". PC re-booted but once again, NO POST.
Pulled the lithium battery out. Voltage checks out at 3 volts with my voltmeter. Cleaned the surfaces and re-installed. Still the same problem.
Cleared the CMOS again, let it POST, this time chose F1 to continue to boot. Everything loaded fine though much slower. It wanted to install the drivers for the built-in audio that I wasn't using previously, so I cancelled the install. Went on line in search of help and here I am!
Anybody have any ideas? Your help would be greatly appreciated.