1chip SNES problem

Discussion in 'Repair, Restoration, Conservation and Preservation' started by merlingt1, Feb 25, 2017.

  1. merlingt1

    merlingt1 Newly Registered

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    Hi everyone, new member here, hoping someone can help me figure out my SNES problem.

    I just replaced the caps in my 1chip-03 SNES with an SMD kit from Console5. The console was working fine before I replaced the caps. However, I am now having a problem where the display works perfectly fine for a few seconds but then it starts slowing down (FPS) to a crawl and after about 5 seconds it crashes to a black screen. If I try to start it again immediately then I just get a black screen. If I let it sit for a few minutes and turn it on again then the exact same display slow down occurs as before. The problem is incredibly repeatable (not random). The 7805 is new and tested to work correctly. Do you think this is a bad (new) capacitor or some other important component failing? I am out of ideas right now and very frustrated. Thanks for any advice!

    Update #1:
    I've also tested it with a Super Gameboy since I believe it bypasses the SNES CPU (not entirely sure on this) and the problem still occurs.

    Update #2:
    Removed all the smd caps and remeasured them. All tested fine but I still replaced the three 33uF with non-smd caps since these were reading slightly higher at 38uF. The problem persists although now it takes longer for the video to crash to a black screen and while testing it the sound went out entirely.

    Update #3:
    I popped in a diagnostic rom into the SD2SNES and got a failure of HV Timer. Seems like a bad CPU/PPU :(.

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    Last edited: Feb 26, 2017
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