PROBLEM -----> The screen has a problem like the picture (streaks or distortions):
IC4 integrated in the T-con card has failed. If you are not able to replace the IC, replace the t-con board.
There is no sound at first startup, but after a while, vertical colored lines appear on the screen:
IC7 on the T-con card may have failed. If you are not able to replace the IC, replace the t-con board.
Other PICTURE malfunctions;
If the T-con card is intact but there are streaks or distortions in the image (excluding dead pixels), cut the lines of CKV1 and CKVB1. If the problem persists, disconnect the CKV2 and CKVB2 lines as well. If the problem persists, reconnect the CKV1 and CKVB1 lines. CKV2 and CKVB2 remain cut.
If the display problem persists, cut the STVP1 lines. Try to fix the problem by trying different combinations, but cut or combine the lines with the same name at the same time. Do not short-circuit the signals when you do it, just connect the circuit you cut back.