My T.V. powers up, but sometimes there is no picture, not even snow. Sometimes i power it up and the picture comes on right away, other times it takes several minutes for the picture to come up. Also, sometimes i turn on the T.V. and the picture never comes on.
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Re: GE 27GT722 Picture problem
Regarless of the reason I will give you ,call a service tech for an estimate since is the safe way to correct the problem.
First when you loose the pix put your forearm in the face of picture tube and if the hair in your arm stands up is a good sign because you are not loosing high voltage to the picture tube but if the hair does not stand up it means the crt looses high voltage and for that you need a service tech to troubleshoot.The other reason might not be as expensive If you have high voltage by doing the previus test it might just be a loose conection in the crt board.Do not remove the back cover unless you know what are you doing.Is not safe.
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Sounds like a classical video head problem. May be quite expensive to fix. Of course you can first try spraying the head with a "no residue" contact cleaner and then dry it out with pressured air to see if that fixes the problem.
1)possible bad RF modulator (the small box the
A or B signal first goes thru)
2)Bad tuner (mounted on signal board)
3)or missing voltage to run tuner
You could replace signal PCB,but that gets a little pricey.
I found one of these that had an inductor coil
which is in series with the hoizontal output transistor base open up. It had a bad solder connection where it goes through the circuit board. This might be what happened to your tv.
If so, it needs to be resoldered.
What happens is that you loose horizontal drive and since the voltage that lights the filiament of the picture tube is derived from the flyback transformer this voltage is gone.
Another possibility is that you may have an opem filiament (rare) or a loose connection on the picture tube driver board which is mounted on the neck of the tube.