Question about HP Pavilion dv4000 Notebook
I have the same hp dv4000. The monitor began to flicker ONLY when on battery power several months ago. Now the monitor backlight only comes on for a couple seconds, battery or AC power. It will come back on for a second or two if I hit the button that sticks up (the button that turns off the monitor automatically when you close the notebook). Sounds like the same problem as the original poster. Any suggestions would be appreciated.
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.
Posted on Sep 09, 2009
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Posted on Jan 02, 2017
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