Question about Standard (CRT) Televisions
My TV stopped showing the picture while I was watching TV last night. The sound continues to work. I tried turning it off and on. Same thing, and I noticed the power/standby indicator light flashes instead of staying on, much like it does when you first turn the TV on, though it persists in that fashion. I undid the cable (we just got cable installed) and hooked it straight to a DVD player. Same thing, sound but no picture. Is the CRT shot, or is there some setting I am missing? Thanks for your help, firstname.lastname@example.org
No picture but sound can mainly be of two problems, most of the times it is caused by a faulty vertical deflection ic, you can diagnose this by slightly increasing the screen voltage by turning the screen control on the LOT, a horizontal line will appear if the vertical ic is shot, and the other problem is the CRT base, but this is less common for shot base won't go off at once, it will show picture faded in the beginning. Now another problem could be the horizontal output transistor, if the tv has a high power sound output, the sound power supply will come from smps itself instead of from LOT, check that too, to confirm this, check if the CRT filament is glowing. Good luck.
Posted on Jan 23, 2008
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