Question about Sony Bravia KDL-40V4100 40 in. LCD HDTV

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Turns on "no standby light" picture goes off

Power supply?

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6ya6ya
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Hi there,
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Posted on Jan 02, 2017

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MNfisherman
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SOURCE: I tried to turn on my sony lcd but there is no

You capacitors IN your power supply need to be changed out. If you have knowledge of electronical repair, it should be somewhat easy to moderate challenge. OR< you can get a new power supply. Seems to happen in many of the new tv's these days

Posted on Apr 27, 2009

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SOURCE: turn tv on power light comes on but has no sound

sony kdl40v2500 power light goes on....the screen gets a little lighter but no picture or sound...no blinking lights

Posted on May 08, 2010

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When I turn on the power the screen will light up briefly then go off, then the standby light goes on (red) and flashes in four times flash intervals


Hi,
4 blinks notifies the back light failure . could be the back light inverter board or faulty capacitor on power supply board.have added the image of back light inverter. Also added the picture of the power board. On the picture the capacitors marked with red should be replaced first. If shows the same complaint even after that then you have to change the back light inverter board.

Power supply

25849195-rpi3jfilu1hke134nfog5c4e-2-5.jpg

Back light inverter board
25849195-rpi3jfilu1hke134nfog5c4e-2-9.jpg www.electro-medical.blogspot.com

Sep 04, 2015 | Sony KDL46V2500 46 in. HDTV LCD Television

1 Answer

Lcd tv light flashing but no picture or sound


If you removed power by turning off power itself to the set instead of turning it off by turning the set itself off---that is not a good thing to do.

When power is restored a surge can and likely hit the power supply in your set---time for a tech or shop to open it---I suspect they will find the standby or main power supply is damaged or now bad.

Dec 06, 2012 | Bush Televison & Video

1 Answer

What does it mean when there is no picture and the standby temp light on continuously


It means the set is in shutdown and it based on model listed here has a power supply or related problem.

Nov 29, 2012 | Samsung HLR5067WX 50" Rear Projection HDTV

1 Answer

Nec pxt-42sx1b won't turn on. We press the on button on the remote and the stand by light turns from red to blue but then goes back to standby.


I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have tobuy and try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.3_26_2012_10_39_22_pm.jpg

Mar 26, 2012 | NEC PXT-42SX1B 42 in. Plasma TV

1 Answer

No picture but powers up


there is a problem on your power supply section take out the switching power supply from the unit and test whether it operates normally..if it does the problem probably on your high voltage section specially the circuits backlight...replace them.

May 20, 2010 | Televison & Video

1 Answer

Red light on,press power on grenn light goes on


Have the main power supply checked out first, you only have standby 5v power supply working right now.

Oct 30, 2009 | ViewSonic N3752w 37 in. LCD TV

2 Answers

My Sceptre LCD TV (X32GV-Komodo0 power turns on


1. check power supply
2. check flyback

Ether or you have a ppower fauilure in the unit. and its probably blowing fuses.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Aug 31, 2009 | Sceptre X32GV-Komodo 32 in. LCD Television

1 Answer

My Sceptre LCD TV Power turns on briefly (blue


Power supply is the place to look, look for bulging on top of the capacitors in the secondary side of the main power supply.

Aug 29, 2009 | Sceptre X37sv-Naga 37 in. LCD Television

2 Answers

Green standby/power light bilnks and pic goes out


you have defective power supply! at the hot side section!

Oct 08, 2007 | Sony Grand WEGA KDF-50WE655 50" Rear...

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