One display arrived with a missing capacitor, causing the voltage regulator to run really hot. A replacement was shipped to me quickly, but while I wait for the replacement I'm still using the bad board for testing since it "works".
The other board/screen combo had no problems and ran fine. I have them both hooked up to the same power supply (6 AA batteries), and the same video feed (from my gopro).
Yesterday, I moved them from one enclosure to the other. I put double sided tape on the backs of the screens to adhere them to the back of the board, and I kind of had to force one of the controller boards out of the old enclosure. After that, I plugged them in and one screen came on (the one with the missing capacitor) while the other didn't.
Here's what I've done to troubleshoot:
- Checked power connections, and they're both receiving 7.4v.
- To check if the board was bad I plugged the working screen in, it didn't turn on.
- To check if the screen was bad, I plugged it in to the working board, it didn't turn on.
- Checked the flex connector and all looks fine.
Do you have any ideas of what could be wrong or what else I could check? It's weird that the good screen would stop working while the board with the missing capacitor continues chugging along.