Question about HP Pavilion Ze4805us Notebook

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Video problem. Pavilion ZE4805US laptop

Video problem. When you first turn on laptop, you see initial HP screen then goes black. Ext monitor works. I found if I press the switch that is activated when closing display lid and release it, I see screen display for a second or two.
Suggestions?

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  • LathropDave Feb 06, 2010

    The user replaced the inverter before bringing it to me. What is confusing me is the "suspend" switch that is activated when closing the LCD lid.
    I found that if I have the pc booted (in the blind) and close the lid and then quickly open it, I can see the display for a second or so. I can repeat this several times and see the full screen display.
    Does this still sound like an inverter problem?

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Most likely it is either a bad lcd inverter, due to the fact that you have clear picture on an external monitor. The inverter reduces the voltage coming from the motherboard to a lower level in order to power the lcd and the backlight. If this goes bad then you either get a picture randomly, a dim picture, or no picture on the lcd.

Posted on Feb 06, 2010

  • William Miller
    William Miller Feb 07, 2010

    I understand that the owner replaced the inverter, but that sounds to me like it is the inverter that is bad or dying. I suggest replacing that again, then if it doesn't fix it you may look at the backlight on the lcd. I've gotten bad inverters from places and that has made me misdiagnose a problem before, wasting hours of my time.

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