SF2 has no sound if the board is cold, sound when warmed up.

mauibarber

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SF2 Champion edition. When the board is cold, i.e. first time turning it on for the day it has no sound. After it has been on for a minute I can turn it off then on and get sound. If it stays warm sound works flawlessly. If I put board in the refridgerator for 10 minutes, same problem no sound. The power supply is working perfectly and the A board has been recapped. I don't think its the z80 because the sound works perfectly when the board is a little warmed up (1 min on). Could it be the 12mhz crystal? I am running out of ideas. What is making it stop working when cold and barely warmed up its flawless?
 
Something is not making contact (leg of IC, part of harness, etc) when cold (contraction), but as soon as it warms and parts expand with heat, you get a connection. Something needs to be reflowed most likely.
 
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