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Actually it was an issue with the Jamma Harness Connector, after chasing my own tail, I noticed that it way worse when I moved the...

hrm are you sure your logic probe was hooked up right? It would be very weird if all of 70-90 were dead. 70-87 are inputs from the...

I got the new flyback (off ebay) in and it still didn’t solve the problem. After further investigation, I found two large diodes with...

The board thinks there is a memory card installed. Check PRO-B0 pins 88 = memcard CD1 89 = memcard CD2 Those pins are used to detect...

The 2 large black idc ports on the left side of the board are where you would normally hookup an MV-IC memory card board/cables. Check...

This is likely a unibios thing. If you insert a new cart and go directly to soft dips you will get the garbled text. You need to boot...

I would suggest you clean your carts and cart slots before assuming the Z80 error is a fault with the hardware.

Took the Puzzle Bobble bootleg out of the rotation and ran it with Turf Master and the others carts for 3 hours with no issue.

I would suggest cleaning your carts and cart slots. You may also want to try changing the ordering of the games. Certain combinations...

Hi all :) A tantal capacitor decided to go up in dark & heavy smoke while I tested the MV2F I thought I've fixed. Can't find the value...

I've not found any issues with the board. I went ahead and clean the cart slots and replaced 2 damaged feet. Your audio issue may...

okay, after adding plenty of more bypass caps and polymer electrolytic caps, still no improvement I got desperate, so even though I...

https://www.mvs-scans.com/images/d/d9/Multigame_161_in_1_series_1_bootleg2_b1_front.jpg Its possible they are using one of the clocks...

Seems like the coins slots wiring might be swapped. I have't done any testing beyond the P1 start button. I will run the board through...

I tried your board on my supergun and in my mvs cabinet. P1 start worked fine on both. I'm curious how you were testing it to think...