My Mitsubishi VS-5059 will turn on and power up correctly and displays a darkened image, but after about 20 minutes, it will fade to black (no image), although the audio will still work fine. I have tried adjusting the settings (brightness/contrast/etc.) but they all have little to no effect on the quality of the picture.
I am looking for a way to fix this problem as well as an estimated cost of repair. I was told that if my set is over 10 years old it isn't worth repairing, but I received this 50" TV for free, and I am not about to just throw it away!
Any advice or sugestions?
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Re: Dark Picture to no picture
Probably has some bad solder connections in the deflection/ power supply area, if you dont know about electronics, might call a repairman and put a few hundred $ into it or junk it, also it is not HD, just FYI
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This is a convergence problem and not really a DIY Many amateurs try it to save money but end up spending more on it than a professional. There are dozens on here that managed to fix it for a day or two only to have it fail again.
You are losing screen voltage or whats called the boast voltage most likely. This is probably being caused by a bad capacitor in the sweep power supply. You will need to get a service manual as well as use an ESR type capacitor meter to find the bad capacitor(s). Good Luck
If still under warranty or if you have no electronic repair experience you should take the set back to the shop or to a repair person. Some of the solutions described below can be dangerous, TV's are very hazardous to service. Even when plugged out, TV's can store very high voltages.
This should not be an expensive job at most repair shops. Could be
something as simple as cracked, cold, defective solder joints around and near the vertical output chip, could be a faulty chip and other components in and around the vertical deflection circuitry, or a faulty vertical drive signal from the jungle circuits, or worst case a faulty deflection yoke. Take your television to a shop right away for a proper and safe repair. Do not keep the television looking at the red horizontal line....
you can easily damage or burn the CRT phosphors.
I thught I answered this one but if you disconnet the sensor it should brighten up the picture If it dosent then its part of the brightness curcuit and must be replace. As I remeber thewre are severall models that you could simply disconnect. Or there should be an auto brightness feature in the main menu picture ajustment to simply disable or shut it off. Good luck