My PC boots to black screen after change in BIOS
April 13th, 2014
My motherboard is an Asus A8n-E. I recently tried out the BIOS settings, aiming to overclock the CPU to around 3 Ghz. My CPU’s default clock is 2.2Ghz (AMD 3500+). Now my PC boots to black screen every time. I tried resetting the CMOS/BIOS by removing the CMOS battery for 10 minutes to no avail. Also to add is that I disconnected the Hi-Speed USB cables from the motherboard whilst attempting this fix (the USB ports themselves are on the front of the tower) and I can’t remember which pins to reconnect them to… does this affect the boot procedure in any way?
Any help is greatly appreciated.
Thanks!
your mobo should have a BIOS reset jumper (reset_cmos)
check the manual for it’s location
or leave the battery out overnite might work
leave the USB wires disconnected till you figure the boot problem out
lukeywilkshire replied: Now my PC boots to black screen every time. I tried resetting the CMOS/BIOS by removing the CMOS battery for 10 minutes to no avail.
Normally when a PC does that, its a hardware issue. But since you been jacking with the BIOS settings, well, yea…
So everything powers on, no display on the screen, and no beep codes?
Now, I did some research on your motherboard. Apparently it has overclocking features, including overclock protection. Normally when you have an improperly configured BIOS and the computer fails to start like 3 times in a row, the BIOS prints a message that system start has failed multiple times, reset’s your BIOS settings, and loads into the BIOS.
Even say one guy with this problem:
The bios is a little confusing and there is a floppy/overclock issue. This motherboard will refuse to complete post if the board is overclocked and the floppy controller is disabled.
Overclocking protection works, but sometimes not as well as one would hope.
I would recommend treating it as a normal non posting computer. Re-seat everything! Unplug all the connections, and replug them in, all wires, cables, and pci cards. As well as the RAM. I would not mess with the processor unless you know what you are doing and have extra thermal paste laying around. Also try booting with minimal hardware connected; RAM, and Processor only (if onboard video is available). Try to boot a few times, see if you can trigger a BIOS reset. If all that fails, do as previous poster said, and try leaving battery out overnight (although at this point, I doubt that will do much).
Other than that. Its a VERY old system, maybe your computer is trying to tell you to upgrade =D
lukeywilkshire replied: I tried resetting the CMOS/BIOS by removing the CMOS battery for 10 minutes to no avail
FYI this will only work if you disconnect the power cord before removing the battery and leave it out til you put it back in
Doing this with the power cord still attached is pointless.
lukeywilkshire replied: Also to add is that I disconnected the Hi-Speed USB cables from the motherboard whilst attempting this fix (the USB ports themselves are on the front of the tower) and I can't remember which pins to reconnect them to... does this affect the boot procedure in any way?
No it doesn’t,As for how to reconnect em,Refer to this guide:
http://www.directron.com/installusb.html
If unsure where to connect em on the motherboard,Refer to the manual:
http://dlcdnet.asus.com/pub/ASUS/mb/socket939/A8N-E/e1911_a8n-e.pdf