Question about Sanyo DP32746 32 in. LCD Television

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I have a sharp 32c320 tv, it has power but no picture. The tv has no raster it seems as if it was stuck on video input. The tuner was change but that did not solved the problem.

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  • ivan_rolle Jul 04, 2009

    I have a sharp 32c320 tv, it has power but no picture. The tv has no raster it seems as if it was stuck on video input. The tuner was change but that did not solved the problem.

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I have the same problem i changed the picture tube the problem was solved...

Posted on Jul 04, 2009

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Easy way to Diagnose is get a known good CCFL from a laptop or LCD TV and start plugging it in to the existing Cathode's Ports one at a time. Generally its a bad CCFL on these multiple units.. (2,4,6) Bulbs.. Moniserv.com for replacements.

Posted on Jul 02, 2009

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2 Answers

No Picture


Hi,

Let us try eliminating the video process by connecting an external video source such as a DVD player in any of the Audio/Video INputs. Doing so would confirm the tuner (and/or perhaps the logic) circuitry.

Most TV tuners would use a 33 volts reference voltage for the VCO to shift frequencies. The 33 is normally regulated by a dropping resistor and zener combo. Pls check this as they could be the issue. It may be to your advantage if you could post the brand and model of the PTV or at least the tuner block.

This is of course assuming that you are familiar with electronic circuitry and components, use of a DVM and safe practices involve when performing voltage checks on a live unit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards. Thank you for using FixYa.

Oct 16, 2008 | Televison & Video

4 Answers

No color


Does it have a video input? Does it have color when playing a vhs tape or dvd into the video input?

Does the set show the raster lines? Is there any snow showing on the raster?

If the set does not show color with an a/v input either then it is likely the main power supply section feeding the deflection system or the video processing is bad.

RCA sets more than a few years old are not good investments for repairs, unfortunately.

Let me know the answers to the questions above and I can give you a more precise suggestion.
 
 Good Luck
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Feb 02, 2008 | JVC AV-27S33 27" TV

1 Answer

How to fix 14v-s100 sharp crt tv no raster only channel and volume display on screen


If there is no video signal input, this kind of fault can occur. An abnormal "Screen" voltage too can be the cause. If video processor IC or the tuner is faulty, this kind of fault can occur too. You should check all this. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter".
http://electronicshelponline.blogspot.com/

Jul 25, 2014 | Sharp Televison & Video

1 Answer

Power light is on but no picture


you did not mentioned if you have raster or none, if your tv has raster but no picture your problem is in your I.F. section and your tuner, now if no raster, you can check your power supply, check your 5volts, 9volts, and 12volts check any alternatives that cause of no picture..

Sep 09, 2013 | Toshiba 40RV525U 40 in. LCD TV

1 Answer

Television will not come on. Have power but no picture


You did not say if you have raster on the picture tube when TV is turned on. If yes, to confirm any problem with the TV tuner section, connect a DVD player, VCR or A/V output of another TV to the A/V input of your defective TV. If you get picture, problem is with the TV tuner.

Apr 12, 2011 | Sanyo Televison & Video

1 Answer

I cannot watch cable TV on Input 1 when Input 2 is activated.


Tries to reset the tv Tuner board back to factory setting.By go into the tv menu.Go to PICTURE,go down to reset the Tuner board.All the HDMI ports should work now.Not,than the HDMI port 2 is shorted and dead,don't used the HDMI port 2.The tv should work fine,or tries websites like Shopjimmy.com,Ebay.com to buy a refurbish Tuner board for the replacement.

Jun 16, 2010 | Sharp Aquos LC-45GX6U 45 in. HD-Ready LCD...

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

SHARP REPAIR HELP


changing the eeprom ic should solve your problem.

Apr 11, 2008 | Sharp 27N-S100 27" TV

1 Answer

42h83


this tv needs to have the scan convertor module replaced or the caps replaced in the current module some h81 82 chassis scan convertors are still available they can be 100-300 dollars depending you may be able to get it rebuilt

Dec 07, 2006 | Toshiba 42H83 42" Rear Projection...

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