(Topic ID: 142679)

LAH - No Display


By kcZ

4 years ago



Topic Stats

  • 3 posts
  • 2 Pinsiders participating
  • Latest reply 4 years ago by kcZ
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

This one has me pretty confused.... I have not played this game in quite awhile, in fact the wife was the last to play it but she did not report any problems. I saw a WTB ad here on Pinside and I thought, why not let it go. Well, first I flipped the switch and only the playfield and backbox lights came on. It would not boot any further. 5v tested at the CPU, looked fine. Poking around, I noticed a bit of green stuff on one of the pins for the CPU. I pull it out, and clean it with white vinegar. Flip the game on and it boots up, but the DMD is blank. I can play a full game but no DMD. Check voltages at the DMD.... 68V, 5V, 12V, -110V but the -98V was measuring something like -28 (forget exact value). Checking PinWiki... I replace D11 zener diode. Boot the game up, same result but I don't get the -110V anymore nor -98V. I don't know what the heck is going on here... Any tips?

#3 4 years ago
Quoted from ChrisHibler:

You should rebuild the whole -110/-98V side of the power supply.
Most times, you can't get by changing a single component.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

That probably is my best bet. I have been assembling an order to Marco... looks like it is time to add a few more items and place an order.

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