Feb 9, 2020, 6:38 AM
Post #1 of 2
Model: TCL Roku 49s405
Yes Backlight no picture, replaced main board, non-existant t-con?
Powers on, has full backlight. No image. No sound coming from main 3 HDMI inputs when I stick in a chromecast, though who knows if this thing is just sitting on a roku menu or something. Buttons on the bottom generate sound but they're likely hard-wired.
I open up the back. Components look good. I replace the main board. Same exact issue. So I'm thinking it's the t-con except.... I can't seem to find it. I trace the ribbon cable from the main board down to the bottom of the TV and it connects to a very thin (1-2cm) board that runs the entire length of the TV under an additional metal shield. Doesn't look like a t-con board. Can't find a replacement online. Is this thing built into the video board? How do I further troubleshoot?
In summary: yes backlight, no video, unknown sound, video board already replaced and did not fix.
Please and thank you.
(This post was edited by tvnewbie23 on Feb 9, 2020, 6:33 PM)