Originally Posted By: tom slick
Has anyone in BITOG land repaired their own TV by replacing or repairing a board?
If you'd like, I'll report back what was replaced on my brother's 3-yr old Vizio when he gets it back.
I've fixed several pieces of A/V equipment & computers over the years. The TV's and monitors were all CRT-based. I closely examine all components, looking for burned spots and bulging electrolytic capacitors.
If yours is still under warranty, then don't open it. If not, and you're the adventurous type and good with tools, then crack the case remembering what screws went where. If it's loaded with dust, blow it out with an air compressor, a can of air or an electric leaf blower. Also check the fans, if there are any.
No doubt there are thermal breakers in many of these sets that will turn them off if they overheat. You can also check the PS rails to each board, if you know what you're doing.
It sounds like your power supply is still working and you have audio, so that narrows it down to the video processing board. These video IC's usually run warm to hot. If you find a cool one, it's either Tango Uniform or not getting power.
Things like this are tough to troubleshoot over the net. Since power is everything, I always check rail voltages first. Good luck.