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    MV1FZ, stuck in watchdog, no SP1 /OE

    Greetings everyone, I got another dead MVS that is proving to be annoying to get running. Might have another dead custom IC on my hands, but I'd like a second opinion before I put this in the pile of scrap boards. MV1FZ Motherboard, when powered up it shows bursts of random lines on the screen...
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    Dead STV: some questions on components

    Hi All, Between a pile of junk I recently obtained, I found a SEGA STV. Now, this board is probably junk for several reasons, but I don't like the idea of not at least trying to save it :) 1) The board suffered water damage, it's not severe but it's all across the board. Probably left in the...
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    MV1FZS - Click of death, SP1 always disabled, suspect address decoding failure

    Hello everyone! It's been a few years since I posted here, but I've recently recovered a small lot of defective MV1 boards and started dabbling with them again, for fun! WARNING: Wall of text incoming! First of all, I know these boards are relatively cheap by now, and it's economically more...
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    Bad accident to an unknown board? Could it have survived?

    Hello everyone again! I've recently recovered a bunch of board from a closing up arcade shop. While the boards were sold as broken, some of them are fine... some are indeed dead. Especially the one I’m working on now. This board is from an unknown game, and I think the guy that sold it killed it...
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    Troubleshooting a MV-1FZ with the infamous "Z80 ERROR"

    Hello, I've already posted about this in the introductory section, but for the sake of completeness I'll try to recap everything important in here, and hopefully the experts in this forum will be able to shed some light on the matter. A few days ago I recovered two MV-1FZ boards in non-working...
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    Hello everyone!

    Finally, I can post! Hello everyone! I got here because I was searching for help in repairing two MV-1FZ I recovered from a box of boards found in a closing arcade shop (btw, stay on the lookout for a post on this in the tech section later today ;) ). In the end I've been able to fix one by...
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