Question about Westinghouse L2046NV Monitor

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Monitor comes on, I can see everything perfect then goes black

Monitor: Westinghouse L2046NV
Power light stays green at all times.
The power cord and VGA cords securely fastened and all pins are perfect.
Everything apears perfectly normal for 4-6 seconds then goes black (Example, if a Word doc. is open it is visable)
Green power light stays on.
Tried flicking the power switch to no avail.
I can get the menu screen to come up on power on but it goes black before I can attempt and changes (4-6 seconds).
Power light stays green with screen black.

Can I fix it or toss it?

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  • Richard Liao
    Richard Liao May 11, 2010

    Can you try to hook the monitor in another computer ,make sure it is your monitor issue. maybe it is your video car issue.



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  • 11 Answers

"Most" newer monitors will let you know if the are no longer receiving a signal. Sounds like the backlight is burnt out. Try getting a bright (LED works best) flashlight and shining it at the screen at all angles to see if you can see any of what you were doing. If the backlight is on the fritz, either return it on warranty or buy a new one.

Posted on Jan 31, 2009

  • danman1453 Jan 31, 2009

    If you know how to solder and have a steady hand, I can find the instructions on repairing the backlight. If you are interested.

  • isaykh Aug 22, 2011

    I have now exactly same problem and fix by solder, but please let me know how.



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1 Answer

I turn my L2046NV completely off at night and lately it won't fire up and the green light is flashing?? The first time I simply unplugged the power cord and plugged it back in and it came on......this AM...


Your power supply board is dead, you know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

Hope this help in solving the problem......

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Do you see an orange light on the monitor anywhere? Usually the light turns green when the monitor comes on, but its orange when in "standby" mode. If your monitor is plugged in and you get an orange light, that usually means that your video card has gone out on your computer. When your video card goes out, the monitor doesn't receive a signal from your computer, so it doesn't know it is suppose to turn on. So if this is the case, you need to replace the video card on your computer

If your monitor doesn't turn on whatsoever, and everything is plugged in correctly, then you need to get a new monitor or send this one back to the manufacturer for a defective replacement.

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The problem is with the Westinghouse monitor. The video card inside the monitor is most likely faulty. There are 2 cards inside, 1 is the power supply and the other video. The power cards are typically OK if you are getting a green power indicator. The video card is most likely the culprit and will need to be replaced. If you open the case, BEWARE the capacitors, make sure you drain them before poking around.

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Hi my name is Roety,
I can help you with your issue ,
All you can check is for swollen capacitors visually
after that voltage tests would localize the bad part
Power supply
Main board
panel with tcon and invertors 
If I have helped you with your issue
If you have more questions you can still respond
I will reply asap

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this is the power supply problem. once again check with another good working power cord for the may work.

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well i just had this problem this morning i woke up turned on the monitor and it came on but went out. but i soon found out it was not the display that is not coming on its the black light. if you look closely you can see the display but there is no light to light it up so you can see. it doesent seem to be anything wrong with the circuit board just the black light i am going to be taking the monitor apart to see if there is anything me or any of you can do for the monitor to fix it.

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