31? GE Model 31GT740, after having a people meter and other electronics hooked up to the TV by those rating people (you know who you are), the TV started having problems with the picture not coming on but sound was on. It was intermittent and went away for a while after ?those people? made some adjustments in their people meter equipment. The problem gradually came back and the other night the whole TV picture went out and the TV started squealing like a pig with a hot iron poker in it?s eye. (?Those people? are denying that it?s anything they did).
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There is three numbers are used with model to model. It will differ according to chassis fitted with it. All chassis number will be the same, but the layout will have some difference, and company does it meant for advanced performance. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter". http://electronicshelponline.blogspot.com/
Schematic diagrams to some GE sets are given, that I can't upload by this window. Refer it. You can make sure about this detail, by contacting the authorized service center for GE; providing the exact model and chassis number.
your have problem with the system IC's which store the channel and all the control in the TV or it can be remedy by soldering the pin of the IC's if the problem persist well your have to replace that system.
1.)This set should have the date on the back of it; it should be a a 2003 model.
2.) You may be able to find a user manual by google on the internet.
3.) The part number for the G link is:
238293 and it is no longer available(about a 16 dollar item)--you may be able to find someone on Ebay who has it----these sets with the guide plus never worked very well. 4.) I do this here for free so if this information helps you--take a minute and give me a vote here.
The GE (actually RCA) 31GT740 uses the CTC203 series chassis. The first thing I would do is resolder the coil on the base of the horizontal output transistor and the pins of the horizontal drive transformer, as well as any other solder joints on the main PC board that look weak or cracked. 9 times out of 10 that cures the symptoms you described. If you do not have experience soldering parts on PC boards then have a qualified tech handle it for you.
I think you have a problem in the vertical circuit in your tv. It sounds like you have a loose solder joint.
The set would have to be taken apart and re-soldered. You really have an RCA chassis inside your tv. RCA's have a lot of bad solder connections.