@eddiewang76529 excellent troubleshooting. The clicking commonly happens with a bad mainboard. Yours is more complicated since you get the signals except video. The problem is that your T-con circuit is on the mainboard. If you can, try to rake some good images of the mainboard. It’ll have to be focused and large enough yo zoom in to the components and the reference designators ( if this board has them). We’d be looking for Vdd, Vss and other test-points. Also, there should be a 12v line going to the panel. If the test-points are there and if the voltages are right, then a Tape-off can help. Remember that even a tape-off only works about 75% of the time.
Add a picture of the connectors where the two ribbon cables terminate too. Lets see what that looks like.
+
+
=== Update (10/09/23) ===
+
@eddiewang76529 check the few components I marked with some blue arrows. Check for continuity and voltage (VDC). You'll have to test those with your TV "on" so be mindful of the power board etc. Use your probes to touch things on the board, not your fingers :-) At that point it could be a shocking experience. So, use caution and consider your power board will bite.
@eddiewang76529 excellent troubleshooting. The clicking commonly happens with a bad mainboard. Yours is more complicated since you get the signals except video. The problem is that your T-con circuit is on the mainboard. If you can, try to rake some good images of the mainboard. It’ll have to be focused and large enough yo zoom in to the components and the reference designators ( if this board has them). We’d be looking for Vdd, Vss and other test-points. Also, there should be a 12v line going to the panel. If the test-points are there and if the voltages are right, then a Tape-off can help. Remember that even a tape-off only works about 75% of the time.
+
+
Add a picture of the connectors where the two ribbon cables terminate too. Lets see what that looks like.
@eddiewang76529 excellent troubleshooting. The clicking commonly happens with a bad mainboard. Yours is more complicated since you get the signals except video. The problem is that your T-con circuit is on the mainboard. If you can, try to rake some good images of the mainboard. It’ll have to be focused and large enough yo zoom in to the components and the reference designators ( if this board has them). We’d be looking for Vdd, Vss and other test-points. Also, there should be a 12v line going to the panel. If the test-points are there and if the voltages are right, then a Tape-off can help. Remember that even a tape-off only works about 75% of the time.