Question about LG Televison & Video

Open Question

Hi, hope you can help I have an LG 42ln5400 with sound and faint picture when seen in dark room. Alan

With led plug p801 PIN 1 = 90v pin 3 = 145v pin 5 = 145v pin 7 = 220v when plug disconnected ..pin 1=0v, pin3 = 0v pin5 =0v pin 7 = 225v

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad
  • 4 Answers

SOURCE: NAD C370 in protection mode

With closed eyes -replace all capacitors on protection PCB All of those caps are overheated and dry out (they lost there capacidance).Note that capacidance meter will not help you at all. Now unit will work. BUT!!! Most important!!! Check four big filter capacitors in the middle of unit!!!! If they are white (NAD 10000uF/80V) DO NOT USE UNIT AT ALL!!!! FIRE HAZARD!!!!! Contact me... Dariusz
Dariusz70@verizon.net

Posted on Feb 13, 2008

Ad
mewms_14904
  • 1027 Answers

SOURCE: pin alignment on motherboard for led switches

Connecting the Front Panel Header

Table 6. Front Panel Header (J9H3)
Pin

Signal
In/Out
Description
Pin
Signal
In/Out
Description
Hard Drive Activity LED
Power LED
1
HD_PWR
Out
Hard disk LED pull-up (330 ω) to +5 V
2
HDR_BLNK_GRN
Out
Front panel green LED
3
HDA#
Out
Hard disk active LED
4
HDR_BLNK_YEL
Out
Front panel yellow LED
Reset Switch
On/Off Switch
5
Ground
Ground
6
SWITCH_ON#
In
Power switch
7
FP_RESET#
In
Reset switch
8
Ground
Ground
9
+5 V
Out
Power
10
N/C
Not connected

Posted on Apr 01, 2008

  • 14 Answers

SOURCE: Dell 1800FP Dark, No Power but power supply seems fine. Help!

I just repaired 3 1800FP's - all dead, no lights.
Firstly a dead 2AS01 is 95% of the problem, because some fool designer left out the protective zener diode - cheapness.
Mouser Electronics does not have this part, but lists it at 37 cents in lots of 2500, and gettable at $2.66 somewhere else.
You must also replace the two small value electrolytics near this IC, as some had an ESR of 40 where <0.5 is where it should be.
I suppose as the electro's dry out, the spikes can zap the IC. The quacks on ebay flogging 2sa01's alone, probably hope to sell you another one down the track (at a fat markup).

There are 2 'Sam Young 2200uf' electros that really should be replaced, with ESR or 2-30 ! Ideally replace ALL electros, as the others will be off - but those 4 as a minimum and using a jewelers loupe, resolder other joints on the transformer and anything that looks more dull silverish, than the rest. A 1 inch used and worn paint scraper will get the case open easy.

DANGER, CAUTION : Finally when refitting the inverter board, ensure the steel tab is over the TOP middle of the board facing away from the power socket (SO YOU CAN SEE IT) . The board sides in flat. It is possible to scew the board down with a slight bend, with the tab pressing over the pcb tracks - very , very bad!

Now all I need is for some kind soul to improve the fix by stating what the value of the missing zener should be.

PS. Just because the caps are not bulging does not mean they should be OK. Most wrecked 10 year old power supplies have better ESR's, so the electronics must be hot under the cover.
I have seen bulging caps with a GOOD ESR, and non bulging ones with an ESR of 47.

Canberra

Posted on Aug 28, 2008

javswr
  • 44 Answers

SOURCE: No Picture & No sound. Red LED, Green LED, Red LED.

If the power supply outputs are good! Then I would say the back light inverter is bad! If the screen stays black and does not come on.

Posted on Feb 28, 2009

  • 52 Answers

SOURCE: HP altec lansing Pavillon DV 6700 not powering

I am sorry to say that this is likely to be motherboard damage. The only other possibility is the the Power jack on the laptop itself is loose or shorted.

Either way.. You need a qualified repair.

The safe bet is a new motherboard.

sincerely,

Sagacious1

Posted on Aug 07, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Samsung TV (model UN40H6203AF) 40" LED. No picture, have sound. Flashlight test can see faint menu screen. Have replaced power supply & main boards to this point. Ideas as to what to do next?


Hi Terry,

If you can see the faint picture in flash light means the power supply and the main board is working. The real culprit is the backlight. Even one bad LED in the backlight will switch off the whole array. To repair this fault the panel has to be opened and the defective LED or LEDs are to be replaced.

This is a complicated, delicate and risky job and must be attempted by an expert only. You may end up damaging the screen permanently if you have not done it before and try to DIY.

Oct 13, 2017 | Samsung Televison & Video

1 Answer

LG 42LN5400-UA.BUSYLHR back lights not working, sound working, flashlight test shows video working.


This is a common problem for LG 42LN5xxx & 47LN5xxx LED TVs, the problem is defective LED back lights strips, it has nothing to do with main power supply & the main board.
dsc03059-mvker0jlcc34dot055xfvek1-4-0.jpg

Aug 31, 2017 | LG Televison & Video

1 Answer

My LG tv model number 42LN5400-UA no picture


It is a common problem for the LG 42/47 LN series LED TV, the problem is defective LED back lights strip (strips).

You have to open the display panel to find the bad one & replace it. The part number usually is printed on the strips, read 6916L-11XXA, you may purchase it from EBay.

Aug 11, 2017 | LG Televison & Video

1 Answer

My Samsung TV has only a faint picture and full sound.


My LED TV has sound, but no picture. - Tom's Guide

www.tomsguide.com/answers/id-2771720/led-sound-picture.html
Dec 28, 2015 - The RCA TVs generally only have a 1 year limited warranty so that ... LG LEDLG LED TV has no picture (black screen) but still has sound TV has ... I Have SAMSUNG UA46 F6400 LED 3D TV I want TO CONNECT MY ... SolvedSamsung ledTV no picture solution; Sony vizio led tv has faint picture solution ...

TV Has Sound But No Picture Troubleshooting Guide ...

? 2:30
https://www.youtube.com/watch?v=ysHfaQKI45M
Aug 31, 2012 - Uploaded by Repair.com
Here are some steps to ease you through TV picture loss-from prevention ... But now when I turn on the tv there only sound nopicture. ... had sound etc. with very very faint picture if you look very closely (which I was). .... How To Fix Samsung LCD TV -Samsung TV Repair (Blank Screen) - Duration: 9:21.

Samsung LCD TV No Picture but has Sound - Electronics ' DSLReports ...

www.dslreports.com > ... > Electronics

DSLReports

Jan 26, 2016 | Samsung Televison & Video

1 Answer

How do I repair my Toshiba LED TV?


T'Con board fault. Replace it. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Aug 17, 2015 | Toshiba 39L1350U 39" LED TV 1920x1080, 120...

1 Answer

Lg model 47ln5750 screen went black


That model is an LED Backlit unit. The LED driver could be bad or there could be a power supply problem. Sometimes the problem is a cable connection. Is there an picture that you can see in a dark room? If you can see a faint picture, the problem is probably the LED back light.

May 18, 2015 | LG 47LN5700 47" LED TV 1920x1080, 120 Hz,...

1 Answer

Dynex dx-l321-10a no video


No video or no brightness? If no brightness on a LCD get the room very very dark and with a flashlight on the screen look to see if a faint (very faint) image of the picture can be seen or not.

Dec 17, 2012 | Dynex 32 in. LCD Flat-Panel HDTV

1 Answer

Black screen


If its LCD get the room very very dark and turn on--with a flashlight near the screen look closely at the screen to see if you see a very faint image of the picture or not---Most LCD flatscreen's (not Plasma) use what is called a back light to light the screen--light source.

If a faint picture can be seen that way the light is not on.

Dec 17, 2012 | Sceptre Televison & Video

1 Answer

Lcd flat panel, no picture


Most LCD sets use backlights---in a dark room with a flashlight look carefully with set on to see if VERY faint images can or cannot be seen--if see them the backlights are not on or not powered up.,

Nov 05, 2012 | Toshiba Televison & Video

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

32 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Televison & Video Experts

The Knight
The Knight

Level 3 Expert

76001 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers

Steve Allison
Steve Allison

Level 3 Expert

5569 Answers

Are you a LG Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...