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I have the back of my tv off. Need to know what board is bad. My tv has sound but no pic.

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6ya6ya
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Posted on Jan 02, 2017

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MikeMaierTV
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SOURCE: bad sound

Being as the set is hooked to a satalight and simply playing what the signal is the problem has to be with the satalight reciever

Posted on Feb 07, 2008

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  • 2 Answers

SOURCE: Lct3285ta Akai

I have one I'm replacing the caps on also, the back is off, here are some pic's.f49c805.jpg8160173.jpg3cfe79a.jpgf402f49.jpgc47399f.jpg

Posted on Jan 17, 2009

SOURCE: sanyo DP42849 no picture but has sound

Sounds like an inverter problem. On some of these sets, the inverter and the power supply are on the same board. These boards tend to be quite pricey, $100 + range. I've worked on your particular model with the same problem, and it was a bad inverter/power supply board. I would recommend you get a diagnosis to be sure.

Posted on Oct 29, 2012

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How can i fix my tv, power cycles on & off, only pixels & screeching sound during the on portion, then cycles off & on again. eventually no pic but sound. how do I figure out which board is bad?


Sounds like back-light inverter problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.

Oct 05, 2015 | Samsung LN46A500 46 in. TV

1 Answer

Tv looses pic and sound than comes back on


It sounds like it could be your main board. Over the years the board's connections could become loose or the board itself can be going bad. I would call an expert maybe someone from an online shop like rivervalleyelectronics.net can get you a board for cheap since alot of these older model TVs parts are not carried by the manufacturer.

May 09, 2013 | Televison & Video

1 Answer

Sanyo DP42849 no picture but has sound


Sounds like an inverter problem. On some of these sets, the inverter and the power supply are on the same board. These boards tend to be quite pricey, $100 + range. I've worked on your particular model with the same problem, and it was a bad inverter/power supply board. I would recommend you get a diagnosis to be sure.

Oct 28, 2012 | Sanyo DP42849 42 in. HDTV

2 Answers

TV turns on and plays sound when turning on but screen stays black


Could be bad caps or the YSUS board or a component on it has failed. I would go with recaping the bad ones on the PSB-power supply board first. this is the first signs of failing caps. Sound but no pic. When caps go bad they cut off the trace circuitry to the other boards they are connected to. Soon enough you won't even have sound, just a blinking fault LED at startup.

Best Regards and Semper Fi

Aug 06, 2010 | Samsung LN32B360 32 in. LCD HDTV

2 Answers

My tv clicks when turned on,it has power, but no pic, or sound


Sounds like you need a new control board. www.partstore.com . Probably under $200 and fairly straight forward to install. Let me know how you make out.

hardrocko

Feb 01, 2010 | Televison & Video

1 Answer

Isignia plasma tv sound but no pic


Ur video backlight inverter board it dead,need a repalcement.

Aug 21, 2009 | Samsung 50 in. Plasma TV

1 Answer

Lct3285ta Akai


I have one I'm replacing the caps on also, the back is off, here are some pic's.f49c805.jpg8160173.jpg3cfe79a.jpgf402f49.jpgc47399f.jpg

Jan 17, 2009 | Akai LCT3285TA 32 in. LCD Television

1 Answer

I replaced the two STK IC's but now I don't have a pic or sound at all.


Gilberto,
Is it actually convergence that was out?? This particular model has a hyper module that can go bad causing video distortion but usually not just bending the blue, red, & green light like a convergence problem...
The Hyper board is a standup-up board on the left looking into the back of the TV, located behind the jack panel plug-ins. It has a metal cage around it and inside that are several 10mf/16v caps that go bad... Their board locations are:
Cx261
Cx230
Cx270
Cz52
Cx178
Cx221
C514
Cx250
Cx670
Cx241
Cx541
The board is no longer available so techs simply rebuild those boards using mini radial camcorder caps.
If you're dead sure it's only convergence I'd say to check the amps over again and take an meter to check the yoke return resistors. One or more may be out of value feeding the amps.
Anything else let me know...

William Rayburn, CET
Premium Technologies
premtech@willapabay.org

Jun 29, 2008 | Toshiba 57H82 57" Rear Projection...

1 Answer

No pic..or sound


a lot of times when a set is dropped the printed circuit board gets cracked, the only way to tell is to remove the back and printed circuit board and check; if not too badly damaged can be 'hard wired' across breaks and fixed

May 08, 2008 | Toshiba 36A61 36" TV

1 Answer

32 in ilo lcd


your tv could have several problems, or one minor one, its hard to tell without seeing it, if you look through the back vents and the backlight is on ,it could be your lcd refractor board ,it could be as simple as a bad rca jack or rf jack depending how you have your tv hooked up , is ther a pic in any source mode,or are all dead, for example in vid 1 with a dvd player, if you get pic ,but in rf or reg tv no pic you may have a bad tuner or cold solder problems ,really hard to tell without more info sorry ,i hope i was helpfull

May 01, 2008 | iLO 3200 32 in. LCD Television

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