jeff412
New member
I have an operation thunderbolt that the sound comes and goes. I bought another pcb and it arrived doa. Hopefully I can use the two boards to make one good one. The sound comes on for about 1 second then goes out for 1 second then back one. If I turn the volume down low it will stay on for for about 3 seconds and then cut out. I tried changing the caps and the power supply but it is still doing it. Any help would be appreciated.
Jeff
Jeff