Today at noon eastern we're going to [hopefully] upgrade my IBM PC750 with a 3DFX Voodoo 1 and a Pentium MMX Overdrive CPU #vintagePC #3dfx https://youtube.com/live/Nj0rDRoNA7Y?feature=share
Before you continue to YouTube

@BigBadBiologist had seen you previous restoration video for the PC750 and was wondering how did you get past the black screen on boot.
@apaterak I think it was clearing the CMOS that did it. (I also reseated the RAM and CPU at the same time)
@BigBadBiologist how do you reset the CMOS? Could not find jumper. Did you just remove the Battery?