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(Topic ID: 272312)

NASCAR won’t boot


By Wally69

3 months ago



Topic Stats

  • 6 posts
  • 3 Pinsiders participating
  • Latest reply 3 months ago by ChrisHibler
  • Topic is favorited by 1 Pinsider

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    91DDBBCE-C116-4E59-A059-EA5DB3443EF9 (resized).jpeg

    #1 3 months ago

    Hey gang,
    I recently bought a NASCAR at an estate sale and attempting to fix it
    Acid Slightly damaged cpu board, replaced u212 and it’s socket (below battery’s) after repairs and cleaning the board I did a continuity test on all u212 pins to where they end up , Pin 26 was open so I repaired damaged Trace with a small jumper wire
    I installed board and now it won’t boot up, the blanking LED L204 and 18v LED L202 are alternately blinking in synchronization with playfield Control lamps and I/0 board relay
    Anyone have an idea on what to check next?

    91DDBBCE-C116-4E59-A059-EA5DB3443EF9 (resized).jpeg
    #2 3 months ago

    Check all the connections, you might have missed one or misaligned one.

    #3 3 months ago

    Did it boot before the repairs were made?

    Alkaline corrosion can drip down into u205/206 area and prevent inter board comms.


    Chris Hibler - CARGPB #31
    Http://chrishiblerpinball.com/contact
    http://www.PinWiki.com/ - The new place for pinball repair info

    #4 3 months ago

    Didn’t try to boot it till repairs were done
    No acid got around any other chips
    I just got back from swapping cpu boards from another NASCAR and the problem followed the board
    I also swapped 210 and u213 and still same

    #5 3 months ago

    I got the u212 chip from Marco, does it need to be programmed? Or is it plug and play?

    #6 3 months ago

    U212 is the RAM chip. It is plug and play. It would have been a good idea to install NVRAM instead of RAM at that time. Oh well.

    You have more corrosion somewhere that hasn’t been found yet.

    Chris Hibler - CARGPB #31
    Http://chrishiblerpinball.com/contact
    http://www.PinWiki.com/ - The new place for pinball repair info

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