Just a note that we had blank touch screen and were able to revive it by replacing he CR2032 battery on the computer board in the mixer. Ours was the Fujitsu variety and is now working fine without having to reset the BIOS settings. Old battery was only putting out .8 volts new one 3.6 so that was definitely the issue. Adapter for keyboard to go into the ancient PS2 plug would not have fit in the case, so I am glad I did not have to go through that process and pull the PC board out of the mixer case.
