Can anyone suggest what might be my problem? I have a DX79SI with a 3960X processor. Up until last weekend it was working fine but now it won't boot. It starts the POST sequence, gets to b9 and shuts down. Nothing appears on the screen. The manual says this code relates to "removable media" but what does that mean? Help would be much appreciated.
I understand that your system is freezing during POST and you only get the POST code B9.
In regards to your problem, the POST code B9 is indeed for disabling removable media, this could be related to a device connected to your motherboard that is not being recognized properly.
I recommend you to test your motherboard on a basic configuration, only leave the minimal installed and try to boot the system up. When it boots, try adding one device at the time until you find the culprit.
Thanks for the reply. What constitutes a "removable device"? I've seen posts on other threads which suggest memory could cause this, but I wouldn't classify this as a removable device. Hard disk drives seem to be classified as fixed devices so perhaps it's something else.
In any event, to "disconnect" a device is it sufficient to pull the SATA cable out of the device, or does the cable have to be removed from the motherboard socket?
The problem is due to a bad memory module. After disconnecting all peripherals I still got the problem, but it started to work when I pulled all the memory except one. Gradually inserting more ended up failing with one module. Without it the system works fine, with it, in any slot, I get the b9 code. I guess memory is considered a removable device. I thought memory test was separate, with codes 2X. Anyway I'm back in action.
Now all that's needed is to get a fix for the inability to sleep properly .....