Momentary backlight... LEDs replaced, voltage seems ok.. what next?
TCL 43S433.
Symptoms:
- at power-on/plug-in, picture comes on (TCL logo) for maybe 1 second
- picture visible with "flashlight test" (dark room + flashlight)
- remote works
- sound works
- Already attempted factory reset (ie. navigating thru menus with flashlight)
- replaced LED backlight strips
- volt-meter reads 87V (per one YT video that suggests the power board is ok?)
At this point I try the main board??