Neo Geo MV2F Backup Ram Region 555 FF40
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Claiker:
Hi.

I´ve got a MV2F, i use universal bios 2.3. when i turn on display Backup Ram region 00D00010 5555 FF40. I think the two rams between suicide battery and the bios could be the problem.

I have tested the rams, some pins not signals, but i have not scheme to fix it.


Do you have any idea how to fix it?

Thanks.
 
Claiker:
I have not signal /we in both cxk58257.

thanks
channelmaniac:
Backup RAM is close to the battery... Look for the RAM that has pin 28 NOT connected to the +5v line on the JAMMA connector.

It's surface mount SRAM and you'll want to replace the one that is connected to the lower 8 data bus pins on the CPU.
channelmaniac:
Once you replace the bad Backup RAM it will continue on with the RAM tests and tell you if it finds any others as bad.
Claiker:
thanks for responding.

one of the rams was very hot, could be wrong, I've removed.

There are pins with corrosion.

I need to buy another ram to replace the bad.

The battery is removed,

If I can I will put a picture.


Is there any way of skipping the backup test ram?
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