My sony tv has a lighted bar on the screen that appears when the screen goes blank. I heard it was called vertical blanking and there is a modification for it. Where do I get this mod and is this common for this 20" tv?
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If you wish to get some details; visit the site linked here. Pull up older posts. http://electro-medical.blogspot.com/ http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts
Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If the voltage is absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.
Sony has had alot of problems with the light engines
and your set is DLP. Call Encompass Parts Distrubtion for Part number and Price then go to E-Bay look under Electronics tpye in part number .I have found same Parts Alot cheaper on Ebay,some by as much as $300.00
you can Google website or call 1-800-638-3328
as a general rule, vertical faults can be divided into two types: ones that cause geometric distortion (a circle will not be round) and those that simply black out a portion of the screen. the former are faults in the vertical oscillator, drive, or output stages. the latter are blanking faults. blanking faults are almost always caused by electrolytic capacitors changing value and thereby changing the timing of the pulses which blank the screen during vertical retrace. In other words, the pulses are turning off the video signals at the wrong time.
the most common true vertical fault is geometric distortion and a foldover of white lines at the top of the screen. this is almost always caused by the electrolytic capacitor on or near the collector of the vertical output transistor or part of the IC which has the supply voltage (B+) on it. In the old tube days, the general rule was that bottom distortion was in the cathode of the output tube and distortion at the top was caused by a fault in the drive circuit. this may help the solution!!
Your inverter circuit is faulty. This controls the lights inside the screen so you can see what is happening on the LCD panel itself.
If you shine a torch into the LCD from the top at an angle you will still see the images on the screen. But with no light inside to project it outwards, it's dark.
A local TV repair shop should be able to do the reprair fairly cheap, but it's best to make a few phone calls and check they will work on an LCD monitor firstly, and secondly a rough quote.
This is a very common fault with LCD monitors.
have a Mitsubishi TV 1993. Model CS-35301. The problem is that there is a white line that is running through a blank screen. The sound is fine just no picture. Have you heard of "Vertical Collapse?"
I would love to save the TV.
nothing to worry just minimise brightness to avoid screen burn.
means one bright hor.line in the middle of screen.
this problem can be solved
1 check vertical yoke connector or wire loose
2 check supply to vertical section which normally comes from EHT transformer
check components in vertical section or print loose