Tap on side of tv.and picture.was fixed.and after a little while.half of the screen would stop working.it worked all day.till i turned it on this morning.just the backlight and sound.
Most common issue here is heat is affecting your set performance. Taps mean that the relay can be triggered off or on. Try puting a fan close to the back of the TV to improve ventilation. If that affects the TV then it is a heat issue, and your tuner CPU is over heating.
SOURCE: White screen only on Sanyo DP26648
Your reported symptoms are odd in that most failures are related to the primary power supply but that takes down both audio and video.
The backlight is obviously working (white screen) but it is no longer receiving any video information and this points to a failure of the logic (or the output of the power supply that services logic) used to control pixels on the screen.
Some screens have the majority of the control ICs actually mounted on the LCD assembly and because of very close pin distances used on dense ICs, they are often not replaceable by hand since they were installed by robotics.
I would first suspect (and hope for) the logic voltage output of the power supply to be the culprit.
If any of you posters have had a repair done and received any kind of a detailed report (you should), would you be kind enough to post it back as a comment to this original message?
SOURCE: Picture goes black on bottom half of the screen
You have a bad connection to the panel or bad caps on the boards. Not something for the DIY'er. High voltages in plasma sets.
SOURCE: I have great sound on my tv but there is no picture
i had the same problem take the back off an unplug the lcd an give it a blow put bit all back together an fany's your ant
SOURCE: Our Big Screen TV a 42
The problems must be trouble shoots by the shop.The priced to trouble shoot and replacing boards should aroud $500-$600 dollars.
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