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Trimmer not working

Dark screen no picture and no sound

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Need to change the ic, ice.

Posted on Apr 13, 2014


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Posted on Jan 02, 2017

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1 Answer

Screen goes dark after 5 minutes with sound


Could be the ballast boards for the white light.

Jan 04, 2014 | Vizio VP422HDTV10A 42 inch 720p LCD HDTV

1 Answer

Screen is the color blue?


That isn't convergence that does that. There are "screen" trimmers, if someone has messed them up you can get all one color, but the usual cause is the picture tube going bad. The screen trimmers are on the PC board on the gun (narrow) end of the CRT. Some trimmers are color drive and others are color black level, or "screen". Don't adjust the color drives, it is a delicate balancing act to get them right. Find the one labelled blue and turn it down. If all you can get is too dark, turn the red and green up, just enough to see a dim color haze in a blank picture. Balance them out so the haze is gray. Then turn them all down just a hair so the screen is just black. Then try a picture. If you can't get gray on a blank screen then go to the high voltage transformer (the one that can kill you if you touch the wrong part) and adjust the "screen" control on its side up (it adjusts all the colors together). If you still can't get gray, one or more of the color guns is weak, and you may as well chuck it.
Of course it could also be a bad blue drive transistor, but fixing that takes more expertise than you can get from a forum.
Actually, just getting the TV open and propped up so it doesn't fall over is a job in itself...

Jan 04, 2014 | Samsung PCL5415R TV

1 Answer

Picture screen is dark. sound is working but no


Ur LCD inverter backlight board is dead.U have to replaced this LCD inverter board to get ur picture back.It a long board in shape.Tries Shopjimmy.com,Ebay.com to buy a reburbish LCD inverter board for the replacement.

Mar 27, 2010 | Televison & Video

1 Answer

Tv picture is too dark- worked with contrast and


This sounds like low screen voltage(A1)try adjusting the a1 voltage bottom control on flyback transformer if you have a voltmeter, voltage on crt base possible market screen or A1 shoud be beteen 350/500 volts when making adjustment remember to take into account current taken by meter If voaltage will not adjust flyback transformer will have to replaced

Mar 06, 2010 | Televison & Video

2 Answers

It was working fine then no picture dark sceen sound work fine


More information is required. Your backlight is lit (screen not dark) but I need to know what you have connected to the TV (your sources) and how they are connected. Does the menu/OSD (on screen display) work?

Oct 19, 2008 | Sony BRAVIA KLV-S40A10 40 in. HD-Ready LCD...

1 Answer

No Picture


where can i buy Deflection board for RCA D52W20

Jul 08, 2008 | RCA D52W20 52" Rear Projection HDTV-Ready...

2 Answers

Durabrand TV picture died. 2 yrs old


hats the shelf life on that tv

Jan 21, 2008 | Durabrand DWT1905 TV

2 Answers

Dark Picture


Symptom: NO PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: DARK PICTURE
Cause: DEFECTIVE 3D/YC COMB FILTER
Symptom: DARK PICTURE
Cause: DEFECTIVE C724

Jan 16, 2008 | Hitachi 50SBX70B 50" Rear Projection...

1 Answer

No picture but have sound


Solder any / all bad connections , esp. vertical output IC......

Nov 07, 2007 | Quasar SP-2719 27" TV

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