Accidentally hit CMOS jumper, SSD won't boot, can't use keyboard to adjust BIOS settings

darumablue

Commendable
Aug 13, 2016
2
0
1,510
Hi crew,

This has been my first big computer problem in a long time. I have an ASRock Z68 motherboard. The other day I was fiddling behind the computer to plug in a USB peripheral and accidentally hit the CMOS jumper button.

When the computer booted again, it briefly splashed the ASRock Splash page (big graphic screen with the logo) and then quickly transitions to a black screen showing the Motherboard BIOS, including options to go to the Boot Menu (F11) and other settings.

However, my keyboard doesn't seem to work for navigating the BIOS menu. I noticed this was the case when my computer restarted, and when it would boot, the keyboard wouldn't work for selecting a Normal Boot or Safe Mode.

It seems that what I might have done by returning to the BIOS default settings was change the boot setting on my SSD where Windows lives, either from IDE to AHCI or vice-versa. I'm unclear which. Also, the BIOS screen DOES recognize both the SSD and an attached HDD. So, doesn't look like either of those have failed.

Things I've tried:

1) Unplugging all unnecessary components. I have booted with just a cable attached directly to the motherboard to my monitor and nothing else.

2) I've tried multiple keyboards in multiple USB slots, especially focusing on the USB 2.0 slots and the USB slot closest to the corner of the motherboard's I/O panel.

3) I've tried mashing the bejeezus out of the keys on multiple boot ups to try and catch it at the BIOS start up screen.

4) I've purchased a USB to P/S2 to try and access the BIOS that way. My keyboards receive power, sort of. The simpler keyboard's little LED logo lights up, but the green light next to the home icon (not sure what that means) will not light up. Not sure what this means.

5) I've taken out the CMOS battery and let that sit for 12 minutes and then replaced it. Not sure why I would want to restart the BIOS again, but I've seen it suggested before, so I tried that.

I'm totally stumped, and feel frustratingly locked out. Any tips?

 

darumablue

Commendable
Aug 13, 2016
2
0
1,510
Update, and a solution!

I thought the USB to P/S2 adapter would let me access the BIOS with a USB keyboard, but there was no response. Desperate, I went out to a second-hand store and picked up an old, decrepit P/S2 keyboard and tried that directly - no converter. And it worked!

I was able to access the BIOS. Here's the strange thing. When I went into the Boot Settings, I couldn't immediately find how to change the boot mode of the SSD, so I hit escape to return to the main menu. But then Windows started automatically booting. Very curious.