Question about Flat Panel Televisions

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Sound but no picture

I own a samsung LNT4042H and 2 days ago the picture went out. It looks as if the tv is off when powered on but you can here the channel its on. Any way you can tell me whats wrong with it?

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Your lamp is burned out.

Posted on Jan 10, 2009

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1 Answer

No picture still have sound HELP


If you have not tried it: unplug the set and if using a cable or sat box unplug that as well---wait for a while and plug both back to see if a reboot of either cures the problem or not.

May 25, 2012 | Samsung 50 in. Plasma TV

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I have a Phillips FLATTV model ... Problem with the Philips Flat Panel Televisions I have a Phillips FLATTV model 42PFL7662D/ 05 I have no picture, the audio is OK, I have had a hissing noise for about 2...


Try with that...
http://www.filestube.com/3c4e959f7e53ba6703e9,g/PHILIPS-42PFL7932-LC420WU5-V2-CIRC.html

Symptom:
Sound but no picture.

Cure:
Master or Slave inverter is defective.
It can be that the driver IC is defective or MOSF
inverter transformers, or 470uF 35V C
Replace driver IC BD9897FS or MOSFET's.
996500046243 IC BD9897FS
996500046242 Mosfet FDD8447L
996500046241 Zener KDZ100V

Oct 18, 2010 | Philips Flat Panel Televisions

2 Answers

Samsung 50 " plasma. PN50A450P1DXZA my screen went out a few days ago. the red power light when the tv is off blinks a lot when i try to turn it on. after a min or so the white light under the logo turns...


I have the same problem. No video just audio.
No on screen display visible either (volume, channel labels) nothing.

Samsung tried to repair this under warranty TWICE within 2 months. Second time they replaced circuit board and it worked for another 8 months. So I paid $1.500 for a TV that died again after 1,5 year - this is ridiculous.

I have no idea what the reason might be and I wont try to fix this since samsung tech could not fix it without replacing circuit board.

Jul 21, 2010 | Samsung HP-R5072 50 in. Plasma HDTV

1 Answer

LNT4042H TV will not power on. No sound, no video.


Check the power supply module voltages first, it should have 5vdc standby voltage at all time the minute the TV is plugged into the wall outlet, try turn on the TV, then the main 5vdc, 12~16vdc and the 24vdc should be on. Look at the supply for burnt parts, blown fuse, etc.
Parts: http://www.shopjimmy.com/catalogsearch/result/?q=Samsung+LN-T4042H+

http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague

Jun 15, 2010 | Samsung LN-T4042H 40 in. LCD HDTV

1 Answer

I have a samsung lnt4042h and it has worked fine until about a week ago, it started making a clicking sound, and wouldnt turn on, the clicking goes on repeatedly until 5 secs after i unplug it. i kept ti...


Howdy,
It sounds like you have a Power Supply Board problem. The PSB is the center Board (towards left) after you remove the back off the TV. Remove Board from TV with the 6-7 screws. Replace capacitors CM811, CM812, CM817 & CS806; 1000ufd 25volts.

Good Luck, big IRISH.

Oct 21, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

2 Answers

Clicking on Samsung LNT4042H


go here and fix it yourself for less than $10
www.earthinfo.org/samsung-tv-makes-a-strange-clicking-sound

Jul 12, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

1 Answer

Sound but no picture


you've lost your backlight, the inverter board are part of the panel, so hopefully u just los a couple caps on your power supply. You should check your powersupply for lifted caps.

Mar 21, 2009 | Vizio P50HDTV10A 50 in. Plasma HDTV

1 Answer

Sound but no picture


It is most likely the inverter, here is a trick to check it. Turn the tv on a channel where you have audio(sound)
Take a flashlight or a lamp with a bare buld and shine it on the screen. Look very closely at the screen, if you see a video image your inverter is bad.
Let me know and I can instruct you on replacement.
lone99star

Jan 09, 2009 | Samsung LN-T4042H 40 in. LCD HDTV

1 Answer

No sound on samsung lcd tv lnt4042h


based on this info what happened is this someoe accidentally changed the setting on where the sound was to be inputed. by unplugging it you returned the tv to default. hope you can rate me thanks for asking and letting me know how it turned out.
S

Jul 20, 2008 | Samsung LN-S4051D 40 in. LCD Television

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