Quoted from Tomass:
Will reducing the power percentage on the other areas add longevity to them? (GI, flashers, LCD screen)
If so, significantly?
I mentioned before, I used a FLIR to look at the CPU temps. I was surprised at how toasty things were. When I was chasing my problem down, I noticed the woofer chip (TI TPA3123) was rated for +85C. And the FLIR indicated it might be an issue, so I turned down the LEDs as a precaution. Obviously, it runs cooler now. Anytime you can keep something cool - it's a good thing.
Not sure if I mentioned earlier, I used to design high power RF amplifiers, so a good chunk of my career was keeping things cool (with help from the thermal engineers).
FLIR below. But PLEASE take it with a grain of salt, didn't verify temps w/a thermal probe. This was a very informal test...just for me. And I'm not implying there's a design issue - there's probably tens of thousands of these boards out that work just fine. The woofer chip is circled in blue on the left. LED's on the left and right sides.
And with the LED's off (color scale likely different than above):
Then I added a fan to the CPU board:
Even tried a thermal pad to backbox (but the CPU board is too far away from backbox to make a huge improvement):
Sorry about the thread derail from Stern IC.