Re: SONY XBR-65X750D TV - 5 blinks, only boots with T-Con half disconnected

Bringing closure to this thread. I tested one of the good MLCC and found it to be 10uF. I ordered a replacement (plus a few extras for next time!), soldered it in, and everything is in good working order. Thank you all for your advice! I learned a lot and I'm happy to have saved one TV from the bone yard.

Re: SONY XBR-65X750D TV - 5 blinks, only boots with T-Con half disconnected

Thank you everyone. I removed two MLCC from the tab bonding board and one of them was indeed shorted. I included a before and after photo of the bad part. The entire screen works now! Any suggestions on how to determine the correct capacitance/specs for the one that needs to be replaced? Unfortunately I don't have an LCR meter, and even if I were to measure the good one that was also removed how would I even know if they were the same specs to begin with? The board is an LG 6870S-2228A but I don't see any...

Re: SONY XBR-65X750D TV - 5 blinks, only boots with T-Con half disconnected

Yes, those two are in parallel but others are different. I attached photo showing all of them. I get between .04 and .09 Ohms for the ones on the bad side. On the good side they are all around 3,800 Ohms, as I recall.

Are you suggesting that I remove one cap at a time, checking each time to see if it makes a difference? If so, yes, I could have a go at that. And do I need to re-solder each one before going to the next? After going through all 8, if it doesn't help, should I then assume it's...

Re: SONY XBR-65X750D TV - 5 blinks, only boots with T-Con half disconnected

Thank you both for the advice.

I tried taping the pins (first 3-4 and many other configurations) but no success.

Testing the MLCCs seems to be the answer. On the bad side there were about 8 of the same variety, spread across both tab bonding boards, that measured very low resistance and both sides had continuity to the ground test point (attached photo shows two of them). So, if I replace those, or have them replaced since I'm not confident about my micro soldering abilities,...

I was given a "broken" 65 inch SONY XBR-65X750D and I'm a sucker for a good project. I've only repaired one other TV in the past but I enjoy learning about the process. However, so far I'm striking out on this one.

The red light was blinking 5 times and the screen would not turn on. Substituting trial and error for experience I purchased replacement T-Con, Main and Power boards but none of them made any difference. Using the original boards, I disconnected the ribbon connectors going out of the T-Con one by one. With only the left disconnected (when looking at the back...

Re: New Members - please post your introductions here

Hello! I'm glad to be part of this forum. I'm an amateur, but I enjoy trying to fix things and learning along the way.