Recent content by Ez9

  1. Revolution X not starting

    I've put back the board inside the cabinet and powered on. the game start and stop at the diagnostic when U67 and U77 fails and the test abort but after calibrating the guns (all 3 are working) the game start and it play without any issue (apart sound issues). Why the game works also if this...
  2. Revolution X not starting

    I've erased the ROM U53 and wrote again but no luck , same issue! I start checking a lot of connections and pin, and all my doubt was on CPU not been able to load the 4 rom correctly so after checking all the wiring I start doubting on Tristate buffers 245 and I've replaced U45 the one that was...
  3. Revolution X not starting

    I've just found some more time to look at it... I've replaced U17 but didn't find any changes, still not booting. then I've removed the rom U51,52,53,54 if i'm not wrong this should be the 4 rom needed for the initial boot and compared to the mame rom files. all good except for U53 have a...
  4. Revolution X not starting

    Ok could be but the board really look in good conditions. There was only 3 caps that was leaking and damaged the board but are in a part of the board that should be not critical for the boot. C22 and C17 damaged 2 tracks that I've repaired and also C16 that have oxidized all the pin of the...
  5. Revolution X not starting

    Back on this board for testing... I need some help to understand what I should check first. Reset signal it's ok, al tensions and clocks are correct and stable. on bus i see signals, but screen stay off... What are the steps on boot? CPU start reading ROMS which one? Does the RGB signal should...
  6. Revolution X not starting

    Dear All, this is my first post here, I've recently found a Revolution X (3 players version) that won't boot. I've re sold some chips that was not showing in optimal conditions, replaced all the electrolytic SMD Caps, cleaned the board , fixed 2 damaged tracks close to C22 and C17 but game it's...
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