Mk1 loud static noise

The -5 voltage is measuring -4.86 at the edge connector of the PCB. The +5 voltage is reading 5.08 at the edge and reading exactly 5.0 volts at ROM chips on the sound board.

The static starts on startup and continues for about 2 min. The audio sounds pretty good after about 5 minutes though after the board is warmed up. Should I turn my power supply up until it reads 5.1 at the chip?
 
The -5 voltage is measuring -4.86 at the edge connector of the PCB. The +5 voltage is reading 5.08 at the edge and reading exactly 5.0 volts at ROM chips on the sound board.

The static starts on startup and continues for about 2 min. The audio sounds pretty good after about 5 minutes though after the board is warmed up. Should I turn my power supply up until it reads 5.1 at the chip?

The -5 voltage is measuring -4.86 at the edge connector of the PCB. The +5 voltage is reading 5.08 at the edge and reading exactly 5.0 volts at ROM chips on the sound board.

The static starts on startup and continues for about 2 min. The audio sounds pretty good after about 5 minutes though after the board is warmed up. Should I turn my power supply up until it reads 5.1 at the chip?

nah, voltage won't be the cause. be mindful the operating tolerance on +5 ranges from 4.75-5.25, anything within there is plenty good. the main board will reset around 4.9 at the chips though.

but most importantly, the MK1 sound board doesn't need -5 :) you shouldn't have a grey-green wire in your harness anywhere. that would be a power harness for like Smash TV.
 
but most importantly, the MK1 sound board doesn't need -5 :) you shouldn't have a grey-green wire in your harness anywhere. that would be a power harness for like Smash TV.

. Thanks. I didn't realize that. I was looking over the manual and I didn't even see you where the PCB game board requires -5 volt. Why do you suppose the board has to warm up there before it starts to work properly?
 
. Thanks. I didn't realize that. I was looking over the manual and I didn't even see you where the PCB game board requires -5 volt. Why do you suppose the board has to warm up there before it starts to work properly?

that totally sounds like a capacitor condition. you changed those. so I'm officially at a loss.
 
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