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Lcd goes dark after 15 minutes

Screens works for 15 minutes and then can hardly see anything. I change the inverter board and still same problem. Could it be the screen? thank you

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More likely the power supply. If you have the ability, use a ESR meter on the caps in the power suply. I think you'll find that several caps are old and failing.

Posted on Apr 15, 2009

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I turn my lap top on and after a minute it goes dark. I can hardly see what is on the screen. Somes I reboot and it works fine for hours.


Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp.

Sep 16, 2010 | Acer Aspire 6930-6771 Laptop

1 Answer

My screen keeps going dark. I have replaced the


Its not the inverter, it's your backlight. Hard work to change, sorry, and it might be cheaper/quicker to replace the whole lcd panel at $100 (£65)

Jul 26, 2010 | Acer Aspire 5610-2328 Notebook

1 Answer

My brightness control does not work just turned on and can not hardly see anything it is up and running what now


Have you tested it with an external monitor?

I would say you either have a damaged inverter board or screen baclight lamp. Usually the inverter board fails in one of the following ways:

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

Mar 24, 2010 | Dell Inspiron 1545 Notebook

2 Answers

Screen goes dark after a few minutes of tv on


It has bad lcd inverter and Westinghouse don't sell the parts either.

Mar 23, 2010 | Westinghouse LTV-32w4 32.02 in. LCD HDTV

1 Answer

My screen went dark suddenly, when I try to restart my computer the screen is tinted red before going dark again. The screen is not completely black as there is letter visible underneath.


From what you are describing, it sounds like the inverter board is failing. This board sits under the LCD screen and is responsible for taking the DC voltage from the battery and AC adapter and converting that voltage to high voltage AC power for the backlight lamp that sits inside the lcd screen. Without that high voltage the screen goes dark. Most inverters do not fail right away, there are voltage fall offs etc. Inverters are approx. 15-20 bucks on ebay, for most laptops, they can be changed out simply by removing the bezel around the screen, unplugging the two connectors on the inverter and changing it out. In most cases except Dell, the inverter is just sitting in there and is not held in by screws.

Nov 30, 2009 | Toshiba Satellite A100-S8111TD Notebook

1 Answer

Screen is dark


your backlight is out and one of two things can cause this . 1 being the invert board is failing, or you have a couple of bad caps in the power supply. you can see the bad one they look like little cans , the bad one will have puffy tops on them ...if you see them change them or have it done if not them you will need the inverter board serviced or replaced

Sep 22, 2009 | BenQ DV3080 30 in. LCD Television

2 Answers

Screen goes dark after few minutes


check your LCD inverter maybe there is loss connection or some parts damage from inverter.

May 05, 2009 | Polaroid TLA-01511C 15 in. LCD Television

1 Answer

Dark Screen Inspiron 9100


If you replaced the inverter board and its still dark you need and new backlight itself http://cgi.ebay.com/LCD-Backlight-Lamp-for-Dell-Inspiron-9100-15-4-WXGA_W0QQitemZ150217509448QQcmdZViewItem

Dec 10, 2008 | Dell Inspiron 9100 Notebook

1 Answer

Laptop screen goes dark after booting .


your issue with your laptop is a faulty ccfl BackLight Inverter, the display uses the backlight to illuminate the lcd screen, the inverter is used to illuminate the cold cathode light in the back of ther lcd theirs countless places to laern about it on google.
They are cheap to replace google your model with inverter at the end..

They are not too hard to replace

Nov 21, 2008 | Dell Latitude CP (0001849d-38380-968-p06e)...

1 Answer

Westinghouse lcd w32701


This sounds like bad inverter board.
Every time LCD goes from Standby to ON state - Inverter Board resets it’s self for approx. ~1 sec, during which time you should see blue screen.
Problem is that board detects problem with voltage/current on one of the seven transformers and shuts down automatically...
As to the costs:
- BestBuy repair service approx.. $600.00
- Buy new Inverter Board & repair LCD your self approx. $200.00
- Another option is to repair Inverter Board, but parts are sometimes hard to get...
Now for the DON"T TRY THIS AT HOME or AT YOUR OWN RISK solution:
-The cheapest method is to bypass protection circuit, by transferring good signal from working transformer (using 10nF/250V capacitor) to detection circuit at the faulty transformer.
Then watch movies on your LCD unlit BAD transformer totally BURNS-OUT.
This will be obvious by dark stripe about 1"-2" tall across your display.
Hopefully the only damage will be to the transformer and not CCFL (light behind your LCD), but when you are faced with a choice of using it for a while longer or throwing your LCD to garbage right now... to me this choice was simple.
Good LUCK.

Dec 15, 2007 | Westinghouse W32701 27 in. LCD HDTV

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