I’ve had a GE LED11DAV3/827W bulb in the hallway for quite a while, but it has the habit of flickering on & off almost immediately after flipping the switch.
I was curious about what was causing this, so I decided to take it apart.
Here are some shots of the power PCB after carefully removing the glass cover & the heat transfer potting:
Cause of failure
It’s hard to say what the real cause of failure was here. The bulk capacitor obviously doesn’t look too great, but measuring it gives the correct value. The BJTs also seem to measure correctly.
I’m unable to connect the board to power and test it that way since I broke it during disassembly.
Unfortunately it looks like there’s no way to figure out what failed.