Question about Sharp 25J-M100 TV

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Tv showing with lines, screen blank but hearing clearly.

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Its white retrace fault, check video section or crt internal short problem

Posted on Apr 29, 2014

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Posted on Jan 02, 2017

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Sony KP-57WV700


Hi. It seems that the g2 voltage of the picture tube is too high, resulting in a white screen, often with white horizontal lines. The g2 (= second grid) voltage is derived from the flyback high voltage. The voltage divider is mostly integrated in the flyback trafo housing.(including the adjustment knobs). A failure in this divider may lead to this defect. The static you hear may come from sparking in the divider. The flyback trafo is soldered onto the main printed cirrcuit board. Sometimes, one of the pins sits loose in the soldering pads.
Turn on the set and observe for any sparking around the entire flyback circuitry, and, or the flyback trafo itself
The screen turns black after a while, as a too high beamcurrent is detected. The set disables the flyback. Stand-by blinks meaning that there is a fault condition.
Be carefull with the high voltages. The flyback voltage is very high (20-30 Kilovolts !) and may be lethal !!

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1 Answer

I CAN HEAR WHAT IS SHOWING BUT CAN`T SEE IT.


Your vertical IC will need resoldered. And check near this IC for bad capacitors. And any and all grounds where there are heat sinks attached to other transistors and ICs. This should restore your TV. Find a hobbiest or TV tech to pull the board out for repair!

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Have your laptop check up the technician, it has somethingt to do with your video card

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My tv screen on my samsung rear screen projector has gone blank(black screen although sound is still clear.


Do you hear a motor spin up and a clicking sound as the tv is first turned on, if yes, You need to look behind the set and see if the lamp is still illuminated, if not replace lamp. Good luck.

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My screen was showing lines in it and wouldn't


Try from that screen selecting Enabling VGA Mode.

Let me know

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Bad interface circuit or power supply. Needs servicing..

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I have a Mitsubishi vs-4543 tv that when powered


check the power supply section.. probably the electronic component got problem.

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1 Answer

White lines


These are retrace lines. This may be a fault in the blanking circuits. On some occasions a weak CRT can also cause blanking lines to show.

This is something you would not be able to service yourself. I would suggest to have an estimate done on the TV set for you to decide if it should be serviced or not.


Jerry G.

Apr 07, 2008 | Philips Magnavox 27MS343S 27" TV

1 Answer

HCM4215W 42 in. Rear Projection Television


When the screen goes blank, hit any remote function that will show up on the screen-like volume bar. If the display is missing as well, then you have a tv problem. If the volume display is there when the tv picture is not, you may require a software upgrade.

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1 Answer

Red Line across Screen


sounds like you have a vertical sweep problem. Where the fault lies cpuld be the vertical output IC the verticle b+ feed, could be the capacitors in the vertical circuit?? Your gonna need to troubleshoot thr vrtical circuit if your not a tech thin my advise is to take the set to a pro for sn est. Good Luck

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