Quoted from mbwalker:Electrical engineer here...
I had a problem where my Munsters had no audio if the pin was warm, shut off (letting the power supply discharge), then back on - no bass, sometimes no audio at all. Turn it on after it cooled off..worked fine.
Spike uses a class D audio amp, a little bit of a different beast. I believe the audio amp chip (TPA3123, if I recall correctly) is not being initialized correctly at power up. Easy to confirm by placing your finger on the chip. If it's HOT, then there's a problem. Just an educated guess, but I think it was heat related due to the backbox LEDs dumping heat into the board. In my case it likely wasn't the amp chip itself since I replaced the chip, so it might have been an associated part (cap). Reducing the backbox brightness helped a lot. The LEDs dump a ton of heat in the board at 100%
Just a suggestion of what I'd do:
I'd add a fan in there to circulate plenty of cool air around.
I'd put a small fan in there and plug it into the wall outlet by running the wire out the bottom of the cabinet by removing the vent screen.
Additionally, I'd plug the fans plug into a remote control outlet. That way I could easily turn it on and off at the wall outlet directly with a remote. Then you don't have to crawl underneath the pin to unplug the fan.
Here's what I use. Comes in a 5 pack with 2 remotes. I use these for my under cabinet subwoofers, outside Christmas lights, indoor Christmas lights, power strips in pinball machines, everywhere. They're great.
Edit - They're on sale and have a 10% off coupon you can add to it as well.
Fort Lauderdale, FL
