The screen on my Sanyo suddenly went "grey" one day. Now I can turn the tv on and for several second the tv looks fine before going "grey" again. Sound works fine. The grey screen also is whitish in color and sometime has a darker grey circle in the middle...weird huh? Any help would be great. Thanks Ken
Dont know for sure but i think that the tube is going bad. Have one in my shop doing almost the same thing.Taped on the tube and it does strange things. My tube tester wont test this kind of tube that is in these sets.Not much help but it is a start.
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Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
No solution sorry but i have a problem too... I usually watch my tv on "dtv" now it just went black no channel is working it automatically went to "ATV" where the channels are fuzzy and my extra channels aren't working. I tried scanning on "DTV" for all the channels but automatically scanned and defaulted back to "ATV". Does anyone know how to fix this?
Whats happening is that the TV' sets of today are really PC's dedicated to a TV tuner..sort of.. As such, well PC's, hang up, get into "Loops" and the like. Also as such they need to be "Reset" to clear any faults, now sometime the circuit called the P.O.R. "Power On Reset", well, it doesn't... and it often takes a couple of "Reboots" to clear the "Fault".
It's possible that the screen itself went defective or the controller board for the screen. It's best to use the warranty at this point because the replacement board or screen panel maybe somewhat expensive. Being that it's only 8 month old, manufacture warranty shouldn't be an issue.
If you have some electronics experience, is it with TV'S?? There is way to much Hi Voltage inside these sets to be tweeking around as this set will have to be plugged in and running when you do the a grey scale alighnment and color drive alighnment. If the pic is out of focus on the outside its probably like you said not wrth a techs time unless you wanna pay a min. bench charge to clean the grids inside the CRT with a speacial piece of test equipment. As a handy man its not a good idea to service these sets as there are no user serviceable parts inside+. Good Luck