Chosen Solution
Greetings everyone. I’m looking for some diagnostic help with a TV I have. It’s an Hisense 65r6e3 and it currently does not power on, but it does have a standby light. The light flashes one long, one short and then one long and repeat. That being said, I have gained access to the control modules and measure voltage at the power cord, and it’s 65v, I assume that’s fine with it being off. I have measured voltage at one pin to the next of the fuse and have same on both sides. Visually both the power board and the other main board, idk what its called, look fine with no signs of burns, broken solder joints or damage. All of that being said, I understand that there are test points along the boards but other than the obvious 3v3 and GND, I don’t know what any of the acronyms mean and don’t know what sort of values I’m looking for. I could also say that I’ve checked every ground for a short and they’re all okay. So, what I’m hoping for is to get a better understanding of how to diagnose this issue. Please and thank you! Attached are pictures of the TV model and the boards.
1st, verify your meter by measuring directly at a wall socket. Then if you still have 65V on that power board at the connector, there is a bad cable. 2nd, look at this site, https://electrofixs.com/hisense-roku-tv-… it has a list of codes and possible faults. You will have to relate your blinks since it does not differentiate long/short blinks. The only possible problem I see in your pictures is the white stuff on the large IC. That is thermal compound meant to create a good thermal connection between the IC and heat sink. But I don’t see the heat sink. If it fell off and was run without it, the IC likely overheated and caused the problem.
