GT FORE green board low voltage issues

Dssrocks

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As the subject says, I have a green Gt fore board that will not get past low voltage error after hard drive check at boot up. It is not the power supply, tried a couple, yes it is the adjustable one. I have measured the 5v voltage at the boot eprom to be fine. I can adjust the power supply up and it will not change. So what can I check here? I'm assuming something is shorted.

Hope someone has run into this before. Thanks
 
What is your voltage set at?
I usually adjust the power supply to output about +5.2V - +5.3V.
Exactly +5.0V is usually too low.
 
What is your voltage set at?
I usually adjust the power supply to output about +5.2V - +5.3V.
Exactly +5.0V is usually too low.
I have tried every voltage increment for. 5-5.5, that is not the issue. Power supply works fine with another board. A component somewhere has failed, not sure how to troubleshoot. Not sure where the board is monitoring voltage for the 5v and 12v sources before it allows the game to load. On a properly working board you can adjust the power supply up or down and it will say voltage ok when it likes it. This one says low voltage regardless of what voltage you give it.
 
The green PCBs are always problems.
The 2 molex connectors on the board are made to drive power to the spinning IDE drive. I usually run power to the jamma + the the 2 molex power so the board has multiple spots to get the power.

Supply the hard drive's power from the power supply directly, bypassing the board.
Always a good idea to get rid of the spinning IDE drive and go CompactFlash.
 
The green PCBs are always problems.
The 2 molex connectors on the board are made to drive power to the spinning IDE drive. I usually run power to the jamma + the the 2 molex power so the board has multiple spots to get the power.

Supply the hard drive's power from the power supply directly, bypassing the board.
Always a good idea to get rid of the spinning IDE drive and go CompactFlash.

I've tried a flash drive, no change. I haven't tried powering by jamma yet but I've measured voltage to be good at the jamma connection so I'm assuming that won't change anything. Got to be something simple, needle in a Haystack.
 
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Green boards are very prone to corrosion, I would run liquid flux on all the surface mounted chips and hot air iron over them with slight pressure on the chip. Fixed several doing that
 
Green boards are very prone to corrosion, I would run liquid flux on all the surface mounted chips and hot air iron over them with slight pressure on the chip. Fixed several doing that

I just tried that with no luck. I almost wish it just had a black screen or something, so I would have just given up long ago.
 
You can try arcade services in Indy but they will not piss with it if it has visible corrosion.
 
You can try arcade services in Indy but they will not piss with it if it has visible corrosion.
Not really any corrosion. If I can't fix it, I'll likely keep it for parts than bother shipping it anywhere.
 
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