Question about Samsung LE37S71 37 in. HD-Ready LCD TV

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MY Samsung LE37S71B Backlight turn on for few seconds & then turn off.

When i power on my Samsung LE37S71B Backlight turn on for few seconds & then go off . if u power off & then turn on pic come for few sec .

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Replace inverter board or power supply!

Posted on Jan 21, 2013

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Posted on Jan 02, 2017

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Picture dimmed. can see the picture and in menu increased the backlight to max but did not go back to normal. checked eco settings and did factory reset. still very dim but can see the picture.


Yah kindly follow this tip. After loosing the back cover when the tv power cord is removed from power socket, check for bulged or defect power capacitors in both the primary & secondary side of the power pack if found any kindly replace it with the actual or equivalent value as this electrolytic capacitor defects is much common for Samsung power packs

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JVC LT-42E910 LED flat screen TV, backlight comes on, menu box is displayed but after about 5 seconds backlight goes out. Picture and sound still working but no backlight. How can I troubleshoot?


jvc tv backlight Questions & Answers - Fixya

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Get free help, tips & support from top experts on jvc tv backlight related issues. ...JVC LT-40SX6AT flat screen. Was watching TV ... ...jvc logo, has sound but nopicture Backlight is defective. I suggest ... Question about LT-42E910 42" LCD TV.

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Samsung plasma tv model ps42a457p1d when you turn power on power indicater light comes on for a few seconds then dissapears tv dead


My Samsung 42inch plasma ps42a457p1d won't come on at all I've switched it off & on & changed the fuse the light came on for a few seconds then went off again

Feb 04, 2013 | Televison & Video

1 Answer

Samsung 27" lcd tv picture goes black, still have


0ne of 3 has failed:
(in order of probability):

1. Backlight inverter
2. Power Supply
3. Backlight

Please seek the expertise of an experienced TV repair technician - as they contain potentially lethal voltages that must be properly discharged before work can begin.

Thanks!(*&^%

Mar 19, 2011 | Samsung LN-S2738D 27 in. HDTV LCD...

4 Answers

Samsung 920nw Turns on, warms up then goes off.


Yes, it can be bad lamp assemblies (see my bad backlight album) due to poor soldering works or just worn out. You need a set of spare lamp assemblies to find out if it is the lamps or the inverter circuits, the inverter goes into shutdown mode if there are short circuits, or the lamps are drawing too much current, or the lamps do not conduct after firing voltage is applied to the lamps. You can also have open/shorts winding of the inverter transformers. One thing about the caps are that they can look OK but have high ESR. One experiment you can do is to heat up the caps using hair dryer for about 3~4 minutes then plug the monitor to the outlet and see if the lamps will stay on.
Here is the service manuals, at least you can take some voltage measurements.
http://elektrotanya.com/?q=showresult&megnev=samsung&megnev2=920nw&kategoria=&kat2=all

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

Jun 04, 2010 | Samsung SyncMaster 920NW Monitor

1 Answer

Samsung Freeform fell in water now bcklight acting weird


hey my phone is acting up when i try to go on something it go to something else then it turns of plz help me

Apr 09, 2010 | Samsung Cell Phones

1 Answer

When turning on my Samsung lcd i get a few


There are two places to look for the problems, the backlight inverter board and the power supply. Look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find.

Nov 16, 2009 | Samsung LNT5265FX 52 in. LCD Television

1 Answer

LE40R74BD VOLUME OK BUT BLANK SCREEN


sounds like the backlight is out, can you see a picture when shining a flashlight on the screen. if yes you have either a bad inverter power supply or bad screen (panel).
both are serious , also could be just a few bad capacitors on the power supply, if you want you can do a visual of the power board caps will appear swolled on top and are easy to solder in cost about $1 EACH

Jul 27, 2009 | Samsung LN-T4665F 46 in. LCD Television

2 Answers

Samsung monitor picture clicks off after 2-5 seconds...


Yes, It sounds like the backlight inverter circuit is shutting down. No inverter power, no backlight. On some monitors the inverter circuit will shot circuit the power power supply which makes the power light flash on some it just kills the backlight. You can usually check with a flashlight. Hold the flashlight pointed at the screen and see if you can see any of the icons or background picture. If you can then it is the backlight circuit or backlight tubes, usually the circuit.

Buddy


Jul 24, 2009 | Samsung SyncMaster 204B (Silver, Black)...

2 Answers

My samsung NW920 turns off after 1 min


If the blue LED ist blinking the monitor does not receive a video/sync signal. If the blue LED is on continuously and the display comes on for a few seconds and then goes dark or dim the backlight inverter may well be defective. The CCFL of the backlight needs several hundred volts to function.

Jan 11, 2009 | Samsung SyncMaster 920NW Monitor

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