Hello awesome community!

I picked up a PCChips M530 from eBay and have been unable to get it to post. The board: https://theretroweb.com/motherboards/s/pcchips-m530

The symptoms are no beep at power on. The UMC chip (UM8663BF) begins heating up abnormally hot (too hot to the touch). With my post card, in the PCI slot all the LEDs showing proper voltage appear, but no post codes appear on the display. In the ISA slot, only one of the LED lights come on, indicating a voltage problem to the ISA bus.

What I have tried:
- Removed all connections and components except for the power connection to the motherboard, the CPU, and the speaker connection. No change.
- Tried a different AT power supply. No change. Also verified voltage looked correct with my multi-meter.
- Tried different CPU jumper settings - it was set at 66mhz FSB and 3x multiplier (Pentium 200mhz MMX). No change.
- Tried a different CPU (Pentium 133mhz). No change.

Visually, the board looks immaculate and clean. No capacitors or other components appear damaged or out of sort.

Given the super-hot UMC chip, I am guessing there's a voltage issue with the board someplace.
My question for all of you is, what should I try next to troubleshoot? Is this a dead board?

Thank you!
Tony