I have TCL 55s405, originally diagnosed it with no power. The fuse and caps were fine. Measured the voltage from the powerboard and the output pins were 0volts. There are pictures of the boards in this post https://www.badcaps.net/forum/showpo...7&postcount=20 Nothing obvious on the powerboard is the issue, but that's on hold until I can verify the rest of the unit works.
Decided to bypass the powerboard and I put 12volts directly to the mainboard and applied 216 volts to the backlight. The backlight seems to be fine and turns on as expected. The mainboard appears to be on, as there is a light for optical audio, the indicator light is on and I can hear sound from the speakers. However the display doesn't appear to power on. I located the fuse on the t-con board and it gets 12volts on both sides.
The variable power supply is at about 12 volts and 0.5 amps. It is limited on voltage, I have not tried outputting more than about 12.2volts.
Any suggested next steps to diagnose the issue?
Decided to bypass the powerboard and I put 12volts directly to the mainboard and applied 216 volts to the backlight. The backlight seems to be fine and turns on as expected. The mainboard appears to be on, as there is a light for optical audio, the indicator light is on and I can hear sound from the speakers. However the display doesn't appear to power on. I located the fuse on the t-con board and it gets 12volts on both sides.
The variable power supply is at about 12 volts and 0.5 amps. It is limited on voltage, I have not tried outputting more than about 12.2volts.
Any suggested next steps to diagnose the issue?
Comment