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Lg l1710 inverter board fault

Lg L1710s LCD monitor - inverter board fault ( backlight turns off after 3 secs , turning power on solves for a further 2 secs ) - any componet repair tips / advice and replacement part # information for faulty part /

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  • sargon001 May 01, 2008

    this store does not have the part , in either case i need to repair the board i have , can you help

  • sargon001 May 01, 2008

    the store does not have the part , in either case i would prefer to fix the existing inverter board

  • cancer45 Jan 21, 2009

    I have the exact same problem on a Sony Vaio VGC LS37E. The backlight stays on for 3 sec and then shuts off. Pressing the on/off switch adds another 3 seconds each time. Replace the inverter but the problem persists.



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May i know the model and the make of the product in details so that it can help me resolving the issue is a more prompt manner

Posted on May 01, 2008


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No video,screen is dark,there is audio

Hi doubles,
Power on the unit in the dark room then shine with the flashlight directly in the screen, you will barely see the images. This is because your backlight is not functioning. The following reason is the caused.
1. Power supply - missing B+(supply voltage) coming from this board feeding the inverter board. This is caused by faulty transistor, dried/leaky electrolytic capacitor, open fusible resistor.
2. Inverter board - even the B+ is good from the power supply, if the fuse, driver transistor, driver transformer is faulty no output to the backlight resulting to black picture.
3. Busted backlight - even inverter board is good but if this is busted resulting to black picture also.
Diagnosing the fault is technical and if you don't have necessary tools and test instrument and can't fix it yourself, I would advice you to look for an experienced technician to isolate the problem.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

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1 Answer

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First, check the power supply for the backlight. It's usually a 24 volt supply. Look for swollen caps. If that is ok, go to the inverter board and inspect for damage, ohm out the inverter transformers. Last is to test out the lamps seperately with an external inverter. If a lamp goes out this way, it is bad and causing the whole backlight to go out.

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I have a problem with a gift from my sister, she gave me a viewsonic n2750w that she gave up on once it started to turn on and shut off on its own, i took it to my place, turned it on, the screen turns on...

Ur LCD inverter backlight board is dead.Replaced this LCD inverter backlight board will solved this problems.Tries Websites, to buy a refurbish LCD inverter backlight board for the replacement.The board is a long in shape.

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Have an lg l1710s monitor turn on computer the

YES, You too, bigbill1223, will need to do some soldering of poor thermally fractured solder joints and/or replace some bad electrolytic filter capacitors on your l1710's "switch-mode-power-supply"/ "inverter supply inside the monitor. Visit youtube for "lcd monitor repair""lcd monitor disassembly" videos. You will be impressed with what you find there!!! also visit amd and for all the info you might need to effect a repair. If soldering ain't your thing, then you will pay 10x the cost of parts alone to farm out the work!! There, I got you started. Now all you need is to do some reading of my profile 12fixlouie aka louie12fix on fixya or another guy that's real good nickname= "buddymc" on fixya. Then do a new comment to your original post. Bye for now. 12fixlouie nrt of windy-city

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2 Answers

Screen goes black but still can see the desktop??

Yes this is a back-light problem. The fault could be the inverter board which supplies high voltage to the CCFL lamp or it could be a faulty CCFL lamp, this lamp is a mini fluro tube.
For service, parts and DIY info check out LCD Parts - click on this link to their WEB site : -

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most common lcd monitor break down, check all electrolytic capacitors for leakage and loose board solder specially on the ccfl inverter section.

May 26, 2008 | LG Flatron L1710S 17" LCD Monitor

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most common lcd monitor break down, check all electrolytic capacitors for leakage and loose board solder specially on the ccfl inverter section.

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