Rolling Thunder Problem

sonnyburnett

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I just bought a Rolling Thunder board, a Jamma and the collors are wrong.
Looks a lot like red is missing, anyone know why?
It's a board problem for sure as it's the same in any jamma cab and on my Supergun.
I contacted the seller but I really don't want to return this board as I love the game.
Any help greatly apreciated.

10112009693.jpg



10112009695.jpg
 
At first look it seems like a color PROM problem. First try to just gently reseat the color PROMs, these are the ones marked in yellow in the following picture, which is a rolling thunder that was converted to Skykid DX
closeup.jpg


If that doesn't help then try reseating all the socketed chips in the picture, just lift them a little and push back down.

- James
 
Thank you very much for your reply and detailed picture :)


I reseated these roms but no luck.
I did notice that there is a high pitched sound comming from the other small board that is on top of the original board.
 
small update.
Seller ( world of arcade.de) promised to send me another board.
I never got it :( I even sugested to pay for the expenses and send the bad board back.
I'm quite dissapointed not because of the bad Rolling Thunder board but more because I had very good experiences with this seller and bought a few really nice boards from him.
Now he claims he has sent it and sais that the post was unable to deliver it, Guess what, I know the delivery guy that works our route quite well and he never seen a package for me from them.

So I hope I can one day get this bad board to work 100% again.
 
Check video harness. Use slight tension/wiggle by the monitor and by harness and see if colors or sync changes. If so, you got your answer :)

Kevin
 
NECRO BUMP!!!

Had one of these in the shop that only output blue colors.

Replaced bad 82S147 PROM at 3R to fix it. The PROM at 3R outputs the red and green. The PROM at 3S outputs the blue.

Luckily the dumped ROMs for MAME had the PROM image in it.

Enjoy!
 
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