Having problems with your Dell Inspiron 1521 Laptop ?

Screen is half dark and whistles when battery is unplugged

\015 I have a 1 1/2 year old Dell Inspiron 1521, which whistles when the battery is unplugged and I turn the screen brightness up. And when the battery is plugged in the right half of the screen is much darker than the left. As I work on the computer longer the screen gets darker.\015

Answers :

You could have a defective screen, either a faulty inverteror a CCFL lamp - follow this to determine the fault.

\015\012Defective CCFL backlight, it may have the following symptom:
  • Screen flashs on red/pink and off. \015\012
  • Picture stays on in red and slowly be come normal. \015\012
  • Picture flickering with dim display. \015\012
  • Picture flickering on and off.
\015\012All 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

\015\012Connect an external monitor to your laptop and power it up, 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 for parts, repair service and DIY info.
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