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Re: Picture blinks then gets lighter then darker
Good Day, freden899;
Your 2000 unit may be experiencing fluid on the PCB's (printed circuit boards). Does the pic blank or flicker?
In either case I would say your TV is sick and that you need to see an Authorized Service Center DR. Always ask for an estimate before any repairs are performed.
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The faint background lines are vertical flyback lines. Start your diagnosis by turning the brightness and contrast controls to minimum and view the screen in a darkened room. If you can now see a raster with horizontal lines visible then it is likely that the tubes A1 screen voltage is excessive. The screen voltage is usually within the range of 400v to 600v. Adjustment for this is often part of the flyback transformer. Check all high value resistors
in the screen and focus circuitry. Some of these reistors may be
built into the flyback transformer. As the picture gets brighter the beam current increases, this will eventually cause the X ray protection circuits to trigger shuting off the set. A fault in the video drive circuits to the cathodes of the tube will cause similar symptoms but usualy results in a predominance of one colour, ie
bright red, blue or green raster with flyback lines.
Point the remote to a pc cam. you should see blinking lights which are infrared visible through the pc cam but not visible to the naked eye. This will tell you if the remote is putting out infrared or not.
Please replace Lamp in TV because this lamp is weak in result, causing darker picture and turning off and on TV. Lamp replacement procedure would be written in user manual and its easy. I would recommend to buy Sony original replacement lamp for TV safety. Thanks.
Guess I should have looked throught the next couple of posts... The problem you have there you will not be able to repair yourself but a good shop can fix it temporarily. The CRT (Cathode Ray Tube) or picture tube is shorted, that's what is causing your blinking. You can call around and ask a shop locally if they can rejuvenate it for you using a crt analyser. In the shop here we use a BK467 which would fix the problem for awhile. What they will do is take the back off and hook-up the analyser and remove the short temporarily. That fix could last weeks or even months, in most cases though never more than a year. Turn the RV1791 back down, it has nothing to do with the G2 voltage and you don't want to overdrive the crt anyway. Take it back down until the horz. lines disappear in dark scenes or background. Then take it in and have the picture tube rejuvenated. Then start shopping for a new Tv... You'll need one eventually but this will buy you a little more time.