Ok so something died on my LOTR, I'm thinking possibly on the MPU board

The DMD stopped working,
the game plays however skips some callouts
The game starts modes, the next ball too fast
and seems to freeze at the end of a 3 ball game
Switches all work
Lights work well, however matrix lights pulsate sometimes

All LEDS on the boards light up solid
I cannot see anything burnt or traces missing
All fuses test good
I tried replacing the 74HTC273N at 201 (circled in red) as recomened as a common cause of DMD failure in: http://www.pinballsupernova.com/images/Sega_Stern%20White%20Star%20Repair%20-%20PinWiki.pdf
Tried reseating roms connectors etc.

One weirdness is all main voltages look good however the 50v is running at 73v, but I dont have any other whitestar games to see if that is normal or not but it seems high, possibly the bridge is failing?

Maybe its a rom or cpu chip failing?

Anyways any ideas would be appreciated, damn whitestar boards are expensive and hard to find!

ws1 (resized).jpg
ws2 (resized).jpg

Yea I tried flipping each way to see if it made any difference on both to the display board (26pin) and the one to the dmd (14 pin) and nothing.

If I have to I have to, I'm not to worried about it but just weird, if someone has a multimeter maybe they could check their 50v tap and see what it runs at? I'm wondering if the higher voltage is causing the problems or if its the MPU board.

I really appretiate the feedback - sounds similar, these are occuring without the dmd controller in - I just assumed that if it wasnt hooked up it would operate fine Ill try that one next rather than focusing on the driver board.