Question about Logitech QuickCam Pro 4000 Webcam

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Black screen when plugged in

Ever since last night when i plug in my webcam, the whole computer screen goes black and the only way to fix it is to press the power button to turn it off.

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  • 226 Answers

Sounds like the webcam is bad

Posted on Jul 21, 2009

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Posted on Jan 02, 2017

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My webcam starts to work then the screen goes black how do i fix it?


Hope you had the webcam unplugged from your computer whilst you installed its drivers.?
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It's sort of a solution, but I work in a computer shop and got this screen in yesterday. I looked at it closely and it's actually the backlight that died. I pulled it apart and found that three of the 820uF/20V capacitors had swollen up. If you replace them then you should be fine, but I went for a different approach and took the inverter board from a laptop and put the in the screen and used an external power supply. It's a bit dark but it works fine now.

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Before taking it for repair connect it to a working external monitor to verify the video card is working. It probably will. You most likely experienced an inverter failure. The inverter supplies the high voltage and frequency required to run the backlights. In some cases it is the backlight that fails. If you are comfortable taking apart the LCD putting a new inverter is easy, it just plugs in. Be sure and verify that the cable that goes through the hinge is intact If it is damaged it is inexpensive but requires taking apart the top and bottom to replace.

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