When i try to turn tv on no signal will flash then goes black but still can see very faint picture in the back ground. after many times of turning on sometimes stays on. i replaced the power board but problem is still not solved.
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Try this first. If your tv is connected to a DVD player, use it first. It should not say āno signalā. If there is a good picture with dvd on, the problem is with your antenna wire. Move and extend your antenna or put one on.
Hello. If the TV is actually making a picture, then goes black, I would try the Y Main board. If it never makes a picture, one of the ICs on one of the Y buffers will have a hole in it. If the latter is the case, finding the part will be next to impossible. Sorry... Good luck.
One option to try is to try to factory reset the tv, to do this turn the tv on hold the Down Arrow on the remote and while doing this press the power button then release the down arrow button.
Bit of info on your issue
* Four blinks - No vertical Deflection (V STOP), Screen goes to a single horizontal line then the video signal muted. Check IC1509, Q1505
Vertical bands of faint black are generally caused by filtering capacitors and can be found in the power supply or the 5 volt supply or even the Video processing circuit...it is not an easy task to identify the source of Video hum bars.....we also call them Jailbars.
Another problem seen is faint black lines caused by the TV set being in 4:3 mode all the time....right at the edge of where the picture ends and the black pillars begin, we see a faint black line that never goes away and is normally seen with a full screen....
That is actually image retention, but it's caused by the crystals that create the picture becoming polarized or ionized over a very long period of time....and it's not easy to DE-Polarize them !
But there are some theories out on how to do that.... Certain people suggest running the TV overnight with an ALL-WHITE picture and some suggest an ALL BLACK PICTURE...and some suggest alternating between both !!
Now, a black picture is easy to make, you just deactivate the Video Mute (blue screen) and set it to an unused Video INPUT overnight....
About the only way to make a white screen is to use the USB port for pictures and take a very bright outdoor shot of a piece of white paper that hopefully is out of focus too....That would create an all-white picture that you can plug into your TV set overnight....
Now if you decide to try this, deactivate any displays on your TV set...all you do is press the display button until the Video and/or USB input numbers disappear....
Next day , set it back to normal TV and see if it's gone or if it's REDUCED....try it again if needed, or try the exact opposite if you see NO RESULTS....
My first guess would be a ground problem. The bulbs are mounted in plastic sockets and grounded to the car by a black wire. If one socket is not grounded it will try to ground thru a different socket. I would check for voltage and ground on each socket in the back.
This could be a faulty back light lamp.It is located right at the back of the screen It is an cold cathode lamp supplied by a high voltage from inverter board .Inverter board has a input voltage of 24 volts inverted into 300 volts AC this lamp lights up the screen... You need to open the back cover to check the lamp.....
When the picture go black,tv still have audio?Yes,than those 1 or 2 long boards that call the LCD inverter boards are the problems are dying.If picture goes black and no audio at all?Yes,than the tv Tuner signal board have problems is dying.The tv Tuner signal board it is the board,where the incomming broadcasting signal cable plug into it.Tries websites like Shojimmy.com,Ebay.com to buy those 1 or 2 refurbish long LCD inverter boards or the tv Tuner signal board for the replacement.
The tv Tuner signal boaard is dead.That the board,where the incomming broadcasting signal cable plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner signal board for the replacement.
turn tv on picture comes up 2to3 seconds later tv blacks out then stand by red light flashes 4 times in a row repeatedly..can not turn on or off when stand by light starts flashing but before tv blacks out you can turn tv on and off repeatedly and picture and sound work.You have to unplug power cord for 30 seconds after stand by light comes on to get tv to turn on.
When I try to turn the tv on, the green light flashes and eventually goes back to red. A very faint picture came across the tv a few times but didn't stay. The tv is only 3.5 years old.
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