Question about LG 50PX5D 50 in. Plasma HDTV

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No picture Loud arcing crack. followed by no raster. Audio and all other functions OK

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Sound like crt erea ,eht ,mains problem.could possibly be crt failour.

Posted on Jul 30, 2009

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Posted on Jan 02, 2017

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My Sony KF50 WE620 TV has no picture only horizontal lines what module will cure this problem.


Open up the TV and unplug all the connectors between the circuit boards and then plug them back in, this can restore functions sometimes.

May 19, 2017 | Sony Televison & Video

1 Answer

I have sound but no picture on my tv sharp aquos 20 inch


if you mean have sound but no Pic.or no raster, horizontal section is the culprit. most problem is at the Horizontal output section that drives the Flyback transformer. Pull out that HV cap & test them to ground if there is some arc coming out. No arc means failed output section or the flyback transformer need to be replace..

Sep 25, 2013 | Sharp Aquos LC-20B4U-S 20 in. LCD EDTV

1 Answer

Toshiba 24" led tv mo. 24ps1e VGA is ok raster snow is ok ,after connection of cable only chroma picture seen,no Y signal.


Try to reset it to the factory settings and Them remove the power cable for atleast 5 minutes but Will be better to power OFF for 12 hours

Jul 18, 2013 | Televison & Video

1 Answer

I have the btt350 home theater system connected by a hdmi cable from blu ray player connected to a panasonic 50" plasma 3d tv when playing a disc or listening to the radio from the blu ray player the...


Page 22 in the Manual details the required input to be selected dependent on the connection type.

To enjoy sound from the TV (Page 29)

AUX*1: When using an Audio cable

ARC*1: When using an HDMI cable

(Available when using an ARC

compatible TV)

DIGITAL IN*1: When using an Optical
digital audio cable

And from Page 29

Turn on your TV and select the appropriate audio input mode
[AUX, ARC, D-IN] to suit the connections to this unit. (Page 22)

Page 30 details how to set the audio link.

Setting the audio link with the TV

With the remote control;

Select the actual TV audio connection on the main unit.

1 Press [START] and press [3, 4] to select "Other

Functions" and press [OK].

2 Press [3, 4] to select "Setup" and press [OK].

3 Press [3, 4] to select "TV / Device Connection" and press

[OK].

4 Press [3, 4] to select "TV Audio Input".

5 Press [2, 1] to switch "AUX","ARC" or "DIGITAL IN".

Select "AUX" or "ARC"*1 in "TV Audio Input" when the

DIGITAL AUDIO IN terminal is used for the STB

connection.

Whenever the connection or settings are changed, reconfirm
the points above.


Please leave feedback

Cheers

Andy

Apr 26, 2011 | Panasonic SCBTT350 Theater System

1 Answer

IM A TV TECH. I HAVE A SONY LCD KP-60XBR800 I HAVE NO RASTER. POWER OK, MENU OK BUT NO RASTER ON TUNER, TUNER VOLTS OK,CAN YOU HELP ME PLEASE. THANKS my email sergioaguirre0182@hotmail.com


check the high voltage with the screen control turned up high where there is no raster. suspect problem within the video circuit where there is no high voltage or defective picture tube.some time when the screen is black and the screen control advanced,you can see if the tv has video or vertical or horizontal problems on the screen.service the high voltage circuit if there is no raster or high voltage is seen.no raster can be caused by the no heater or filament in the CRT.---- a defective picture tube can cause many problems, such as, poor brightness ,missing colors,intermittent picture,poor focus,a single-colored raster,arching in the gun assembly,retrace lines in the picture,negative picture,chassis shutdown,noheater or filament lit and no raster to name a few.an open filament or heater can cause no picture or no raster symptom.a defective CRT can have an extremely bright screen.loose particles of the cathode element can lodge between the grids and cause an intermittent black and white picture. simply tap the ends of the CRT gun assembly and notice if the picture begins to flash off and on.---- with a leaky picture tube after turn on the raster dims and get extremely bright.a dim picture with no green in the raster can result from a bad green assembly. a heater-to-cathode short can cause a raster to change colour or a result in no raster at all.replace the picture tube if there is severe arching in the neck of CRT. excessive brightness with retrace lines and a vertical collapse to a thin line can be caused by a bad coil on the neck board of the picture tube.rejuvenate the picture tube when there is very bright green screen. check for the resistance change on the resistors of the CRT neck board for an excessively bright picture with retrace lines.excessive dust inside the CRT spark gaps within the picture tube socket can cause the very bright raster and the chassis shutdown.a defective video amp,luminance buffer,or reference transistor can cause a bright picture with retrace lines. -------- for getting any required parts to replace you can get it from www.radioshack.com or from www.partstore.com or from www.shopjimmy.com --------- thanks.please do rate the solution.thank you for using fixya.keep updated.

Sep 06, 2009 | Televison & Video

1 Answer

My RCA projection tv makes a loud buzzing, humming noise. Does as soon as turned on even before picture comes on, does not stop till tv is turned off.


buzzing noise is cause by small electrical arc inside the unit or a problem in your audio circuit.if you can open the unit up and check if its an electrical arc.

Jun 21, 2009 | RCA HD52W59 HDTV Projection Television

1 Answer

Loud cracking noise sounds like fireworks and wont get a picture


It seems you have loose or cold solder joint connection problem,causing a cracking sound.The solution is to reworks or resolder the solder joint connection in power supply section, audio section and inverter section...

Hope this may help you;

Regards,
VOTIT

Sep 25, 2008 | LG RZ-37LZ30 37 in. LCD Television

1 Answer

NO PICTURE


do you see anything on screen.no picture doesnt mean no raster ,raster mean anything that comes out in display.no raster with sound only mean failure in either,connection in heater which means, loose connection or some new sets declare failure in vertical circuit.so be more specific ok?

May 08, 2007 | Sony FD Trinitron WEGA XBRKV-40XBR800 40"...

1 Answer

Sony trinitron 32 in. pip no video, (raster, with audio)


What you have described there is a classic example of the jungle IC failure. Ic301 Sony p/n 8-752-101-04. A pic with no color, and lines or grainy texture in the picture. Not a project you want to tackle if you don't have the proper soldering equipment or skills. And not a costly one at a good repair shop.. Only real hurdle is getting that heavy monster into the shop. To answer your question, yes what you described there is raster. Even the salt & pepper looking screen with no real decernable image is described as raster. In fact any image generated on the CRT is raster. And yes, these sets are prone to solder joint problems, usually ring cracking in circuits that generate the most heat.

May 20, 2007 | Sony FD Trinitron WEGA KV-32FS100 32" TV

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