Hello,

I have a Rollergames which I have been restoring. Everything is pretty much done and working well, except for one nagging problem. When turned on after sitting a while, there are no sounds (including the tone which indicates the sound board is OK), except a repeated popping sound from the speakers, occurring every second or so. When the machine has been sitting, this usually goes on from 5-30 seconds, before the popping stops and everything works fine. If the machine is then turned off and back on immediately, there is sometimes just an initial pop (sometimes not) and everything works fine. The longer it is left to sit, the popping slowly returns upon restart - occurring longer the longer the machine has been left off.

I have reflowed all headers on the board and reseated all chips. I have not recapped the sound board - does this sound like something a recap could fix?

Any help would be appreciated.

Thanks!

-- Bruce

Thank you everyone!

Shogun00 - I will definitely check the solder joints around the amplifier.

BadBrad97 - I will check the voltages at the soundboard.

PghPinballRescue - I have replaced many capacitors on boards, especially "cap kits" on CRT monitors. What sound board uses the cap's through holes as vias?

Thanks again!

-- Bruce

UPDATE:

So I have done a number of things, and the problem persists. Here is what I have tried:

Replaced all caps on the audio board
Reflowed the solder on the two amps
Hooked a small speaker directly to J5, bypassing the internal speakers
Jumpered the volume on J2, bypassing the long run to the volume knob at the front of the cabinet

Before I did this, I reflowed all the headers on the board, and reseated all socketed chips.

Any other ideas? There is no gong or anything when the problem is happening - just a recurring popping sound from the speakers. But it always goes away, after some time - normally within a minute.

Once the machine has been on for a while you can turn the machine on and off very rarely have the problem for more than a second or two. Sometimes there is even no initial "pop" from the speakers when the machine is turned on after running for a little bit.

Any help here would greatly be appreciated.

-- Bruce