If you think that you have a bad backlight inverter, or if you hear a high-pitched sound that seems to eminate from your display, press <Ctrl>+<Alt>+<Del> and see if the screen illuminates for a brief moment. If so, quickly press the <Fn> and brightness down keys several times to decrease the display illumination. If the computer display stays on, go to your Power settings in the Control Panel and set a lower default brightness setting for all profiles.
This will give you a dimmer display, but you save big bucks on buying parts. My Inspiron 1501 has been working fine with this solution for several months!
You may have a defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp.
Connect an external monitor to your laptop and power the monitor up first then the laptop, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out
www.lcdparts.net
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You need to explain that in a little more detail
Try to hook the laptop up to an external display if you have one, if
not take it to a friends house and hook it up. If the external display
works then you know that you either have
Bad inverter
bad backlight
bad connection
all together bad LCDNone of those problems are expensive to repair. If the external display doesn't work then you have a problem on your motherboard.
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