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CPS2 Multi - not saving the volume setting

I removed the Supercap. Cleaned well everything. Rubbed a bit the solder pads with a little metallic brush and I was able to solder again the Supercap from the solder side. I am not saying the pads are like new now but they hold the solder and the Supercap is pretty stady in position. Also, I think continuity is ok: both poles are gronded and the positive one has continuity with R20.

I didn't get a full win guys and I don't know if it is the Supercap at this point:
In order to get the sound when I turn-on the board after a while that it's been off, I have turn the volume down (completely) and then up.
- Amp output: I get straight the sound just from the left speaker, then, once I turn the volume down and then up, I get the sound from both speakers.
- Jamma output: I get straight no sound, then, once I turn the voulume down and then up, I get the sound from both speakers.

Of course sound keep working regulary if I turn-on the board just after a little while that it's been off and the sound fixed.

I am not a CPS2 expert... maybe the board should be on for hours to get the supercap working well? Is the Supercap the problem?
It is not a big deal, as I can set the sound anytime I boot the board, but it would be nice to fix it once for all.
 
Does the negative leg of the supercap have good continuity to any ground point (with very low resistance) on the PCB? You can tie in multiple points to shared ground without worry. The fact that it takes a while to work before heating up sounds like its dodgy or it could also be another cap gone bad on the A board. If I already had it opened up and on the bench, that's the time to do a full recap if it hasn't been done yet.
 
Crunch said:
Does the negative leg of the supercap have good continuity to any ground point (with very low resistance) on the PCB?
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They are both well grounded. I checked them with the a few points on the jamma connector and other negative solder points.

I put the board back into the cab after last repair... Yep a recap might help... I hoped if someone got/solved the same issue... Anyway, I will keep test the board and see ...for sure these boards were designed to work for hours and hours every day... but, if someone else doesn't need to set the voulme anytime (like me) even turning on the board after two or three days that was off, that means the board has a little issue... For instance my board keeps the volume setting after two hours after been off (?)
 
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