I have an ASUS P5Q SE2 motherboard with 2x 2GB DDR2. I recently added 1x 1GB RAM which is when my problems started.
I can hardly get my PC to boot. When I power it on, in most cases it restarts after about 10 seconds and then there is only a black screen. The fans keep spinning.
If I leave it powered off overnight with the BIOS battery out, in the morning it boots and I am asked to reset the system time. I load the BIOS defaults, set the time and start Windows, and the PC works normally; when I power it off, insert the BIOS battery again and power back on I get the black screen issue.
The last time I was able to successfully start Windows, I tried flashing the BIOS but the problem still persisted.
What can I do to fix this? I've had the problem for five days now.