My sony had the problem of flashing the picture for a minute or so and after a week or so it took several minutes of flashing before the picture would stay. Now it has lost picture altogether but the sound is okay. Standby light blinks steadily.
I've read the cracked solder problems and I have looked on the board that plugs into the end of the pictuer tube but unable to detect any cracking or missing solder, loose wires, etc. I checked the plug and socket but didn't see and burned or correded terminals/pins. I tapped on the boards with an insulated screwdriver while the set was on without anything changing.
If you suspect a board or component problem, please let me know and be as specific as possible. I'm not an electronics repairman but I am capable with specific instruction (grin)
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Be aware your camera is not a professional DSLR with external flash lights.
Most camera's will get warm or even hot when you take several pictures with the flash on in a short time. Most manuals do have a warning about using the flash. Sometimes the camera is only allowed to take a picture with the flash on, once a minute or even once in a couple of minutes. When the camera becomes hot, it will prevent itself against overheating, by not charging the flash again.
Still it can be possible something els is wrong with your camera, but try to shoot with the flash, with greater intervals and look if you can use the flash any longer. Also when the battery is drained, the flash won't charge. When shooting continuously, you will drain your battery much quicker.
I just had the same problem. If your lucky it might be a free 5 minute fix. The five light flashes mean impropper current. I took the front grill off, then behind that is another black cover, I took that off and noticed the circuit boards COVERED in dust. I then took an air can duster and blew off all the dust... works like new. No more flashes and in an out picture. The collection of dust was interfereing with the electrical current.
Could be a weak Picture tube . You can try turning up the screen control but don't turn it up too much you'll get retrace lines in the picture . Turn it alittle at time until picture comes on then turn it down until the retrace lines go away . Then try turning the tv on and off to make sure it comes back on. Be careful you can get shocked if you do this while it is on and you touch one of the circuits . The control is on the flyback or the module thats on the picture tube it will say screen by it . If this does not work you could have vidoe problems or just the picture is no good . Good luck
My picture would go out after several minutes but I still had sound. I took the rear cover off and blew all the dust off with compresed air.I did this for a few times over several days nothing happened.I also took off the rear circuit board that attaches to the tube with a round pin socket and blew that with compressed air and put it back on. The TV has now worked for two days without the picture going out. It worked!!!!!!!!!!!!!!
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.