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You have a vertical IC that is in need of resoldering. And you can bet you have a few weak capacitors very close to this IC that need replaced. And while you are at it, check for a high voltage cap that may be weak in the horizontal section. This would be the next step in saving this TV. If you or a hobbiest can pull this board you could probably do the repair. Use extra caution when you do this. Or best yet find a TV Tech!
if the tv width is ok try entering to service menu (do not use remote control) as follow: 1) turn the set on. 2) press the menu button and hold it down while pressing the power button. 3) while holding down the menu button release the power button and press the volume + button. 4) The screen will display a one line menu, on the left the parameter P00, and on the right the value of the parameter V00 5) release buttons. 6) using the volume + button change the right parameter until 76 7) using the channel down button change the left parameter until 06 (vertical size) 8) whith the volume + or volume - adjust the screen size. 9) when your tv is OK back to parameter 00 using the channel up button. 10) press menu button. and trouble solved.
This is a classic indication of poor solder connections inside the set. If you are comfortable with electronics and can solder, open up the unit and resolder any connections that appear grainy or have rings. That should resolve the problem.
Unfortunately that's an indication of the crt going bad in a Sony.
You can turn the G2 voltage down on the flyback or have a tech rejuvenate the picture tube but either of these are only a temporary fix..
The flyback is the rather large transformer with a red (anode) wire coming from it and attaching to the crt. (looks like a suction cup).
There are two adjustments on the back of the FBT, one is screen (or G2) the other is focus. With the unit on turn the G2 counter clockwise just a little and the picture will get slightly less bright. That should stop the picture from blinking out - or doing so as often. But again, it's only temporary!
Good thing Santa's almost here... :)
If your DVD player is separate from your tv, you might have a loose cable plug or connection.
Depending on the type of flicker you have, a vertical circuit loose connection would cause this. If you could connect it to a cable or antenna it might tell you where the problem is located. A faulty circuit in the DVD might cause this too.
Sounds like you're blessed to have a tv like that!
Some sets have settings that will cut down the sound during a commercial. Haveyou looked at your owner's manual? This tv may have setting to cut out the picture also when commercials come on.
From a technical view point generally commercials have stronger signals than regular programming. This may be overloading your set.
If this is the case, then you need to have it checked by good technician. A poorly operating power supply (not regulating properly) could possibly cause a problem like this. Also automatic gain control circuits could be not working properly.
Your set might have a high voltage leak and that is the noise you hear when is showing the screen problem or even maybe an arking too ,either one is related to the high voltage and it can be dangerous,if you are familiar with tv service you can try to see where is arking and replace the part with an exact replacement but if the set has a leak you will not see it and is not safe to be close to it,if you are not too familiar be safe and call for assistance from a servicer.
I think the solution to your problem is adjustment, not of the brightness but either the `contrast' which is probably too high, or the `sharpening' if your set has this function.
Too much sharpness will cause a shimmering effect, especially where you see an edge between colours.(due to ringing at a very high video frequency).
Too much contrast can start to turn the video signal upside down, causing noise on the peak white in the picture.
Another cause is if the RF signal into the aerial socket is too large,
This can be corrected by an attenuator, costing about £2.
6dB or 10dB can be tried.