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    Super Mario Bros 2 with a shorted CHR rom

    So I have a copy of SMB2 (US) with a shorted CHR rom. Rom is super hot when running and the game is in like 2 bit. Sound works fine just graphics screwed. PCB is clean and capacitors test fine. I have not removed the rom yet. Any suggestions? or anyone with a rom burner
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    Very bad off MV1A save or ???

    Purchased in a panic, this bad boy is missing PC31, PC30, PC22, and PC16. CR3, CR5, CR6, and CR1 are all damaged. NEO-Do looks likes pins 54-64 (52-32 are NC) are all in bad acid damaged shape. Board also have some other trace repairs. I'm $40 in the hole so far. Suggestions? I have most of the...
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    MV1B lost all video after sound mod

    I had the board (M1VB) working fine with an Ad725 setup, then I added the 5v sound mod and lost all video including hatch screen. I replaced the Ad725 with a fresh one and added Svideo port and still I have nothing. I am powering the whole board with 5v 2amp power supply which should be enough...
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    Resistor 63 value

    Anyone happen to know the value of resistor 63 on a Mv1b board?
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