Question about HP Pavilion dv4000 Notebook
Reinstall all drivers for your laptop from the HP.Com website. If the function keys still don't work, you may have a defective keyboard.
Turn the laptop off, then take the laptop keyboard off (usually takes 1 screw - bottom of case, and a few sliders, top of keyboard). And then there will be a couple of thin cables which are connected to the motherboard. There is a sliding connector which holds these on. Push this up, slide the cable in, puch it back down. Do for both cables if you have 2 (keyboard and tracking pad/pointing stick). Reinstall keyboard and try it out.
If that doesn't fix it, replace the keyboard with one from ebay.
Posted on Dec 06, 2008
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Posted on Jan 02, 2017
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