About two months ago, my wife and I started noticing a faint white horizontal line form at the bottom of the screen, then it graduated to the bottom 4" (approx.)showing no picture. Today 05/23/07, when she turned on the set it was showing no picture about 10-inches from the top with a couple white lines through the picture and no picture near the bottom of the screen again. After a few minutes it started to widen and become clear again. Although, while we watch there is always the bottom 4-inches doing some weird things, but almost unnoticeable. We purchased this television in 2000 and really have enjoyed its picture, compared to our friends Sony Flat Screen. We want to save this baby.
Is there any way I can rememdy this? I checked www.magicyellow.com for a TV Repair shop around our geographical region and it only came up with one, which may not even exist anymore. I would like to try to open the television up myself and try to repair it.
I appreciate all the help I can get.
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1) you have problem with the Raster 2) the main causes are a) raster b) picture c) sound d) synch 3) since this are not video, the problem is raster. your must test the voltage from section horizontal out +125vdc+vertical output +80v+all other circuit +12vdc 4) test the power supply for defective. see the diagram attached
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Ok, The vertical Ic is IC301 Ta8427K And Capacitors around IC chroma 2.2 uf 50 volts. You will see small red capacitor ( with C302....4 or 5 ) reference. Replaced others capacitors on vertical section 220 uf 35 V or 100uf 35V. I hope this can help you. Or if do you have any picture chasis, send to me and I will show you where are the problem., Thank you
Set starts, horizontal and vertical deflection work, HT ok, crt heaters ok, but no sound or picture
I turned the G2 voltage up and noticed a white screen with flyback
lines, frame ok. I detected two badly soldered double diode rectifiers
in the secondary part of the power supply ! I checked all other joints,
and everything was ok !! success
White horizontal line (no vertical deflection)
Check / replace R548, R549
Sound but no picture except for a couple of horizontal colour lines
Replaced the frame chip TDA8356, set now ok
TV FINE UNTIL 2 NIGHTS AGO HAVE HAD 4 YEARS, STARTED HAVING A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. HAS SOUND
A FOGGY SCREEN WITH WHITE HORIZONTAL LINES. called retrace lines please check
1 screen control on eht transformer is mituned
2 supply to screen of crt
3 supply to rgb video output is absent
4 connector loose
5 crt base loose