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My Sony tv has no picture or sound but has power. The tv worked fine then one day it would not show a picture. The cable box works fine. When disconnected I still get no sound or picture. Tried several different wall outlets with no luck.
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All symptoms show that cable box is cause of problem, not sure that its internale circuit problem (signal processing in cable box) or its getting distorted signal from cable company.
TV sounds good because it works fine with blu ray player that is HD signal as well.
Change cable box just to confirm it.
I hope this tv would be under warranty so ask nearest Sony service to update its firmware under warranty cover that might fix the issue.
Thanks.
After days of frustration the real problem was with the cable box. It needed a firmware update. Following forum advice I disconnected the cable box power cord for a few minutes, reconnected it, allowed the cable box to reinitialize. Turned off receiver and TV. Turned TV back on and set it to HDMI connection, turned on receiver and all worked fine. Great picture and sound.( Needed to buy an optical cable to go from the cable box to the receiver to get sound from the speaker system. )--the dirtybird
9 out of 10 times, the problem is the device that is hooked up to the TV, and not the TV itself. This is especially true in the case of cable boxes, which have a long history of failures.
Temporarily, you can probably hook up the composite (yellow red and white) cables to get a picture and sound on a different input.
You can try to hook up a DVD player on the inputs (component, I'm guessing) and it will probably work. Then you get to call the cable company!
Your power supply is going south, I have an old sony with the same problem. The voltage level drops and does not have enough 'kick' to start. It will work better when it is warm. The module will need to be replaced.
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