Philips 50pus6503/12

[William1967]

Check the smd capacitors on the t-con, maybe one is s/c.

[Davi.p]

You are not following the right steps... 1st, one must not rewrite the SW if not shure or at the last beach (as we say here) , the symptom sounds as bad screen assy, first thing to do is screen self test, withdraw 12v from psb and connect it to the tcon fuse, detach MB lvds cable, turn power on, if screen produces correct self test the fault is on MB.. second, it is highly likely that tcon has no load protection so detaching the panel or half inhibits outputs, therefore you start checking panel strip boards for SC condensers/diodes, OC resistors... if all ok then bad gate drivers (masking tape etc..)