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Re: replacing hp dv4000 motherboard
Hi I suggest you go to the HP site at the link below and select your particular version and then seek out the manual for it. But system boards are very expensive and tricky to replace. if you are not experienced in laptop repairs then forget it. It's really not worth the effort of replacing the system board unless you can get a good used one. Just buy another laptop and get your data transferred. Go for a used Dell D610. Excellent machines, about 4 years old now but I sell loads and NEVER had a problem. Good build quality, unlike most of todays laptops
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first check fuse in plug. if good then check power adaptor, even if its lit up it still can be faulty or use a voltmeter to check that you are getting continuous current. if good it gets harder youll have to open it up and check the fuse inside it dont look like a normal fuse its small. its at the back next to were you plug in the charger should say f. check picture. its not for youre model but just a demonstration. hope this helps. j.oates
This is a very common problem & it affects the Hp dv2000 , dv4000 , dv6000 , dv9000 series of laptops . In almost all cases this is caused by the video card overheating . There are 2 options , one is replace the motherboard ( expensive ) , the other is performing a " reflow " similar to how xbox 360's & ps3's are repaired . After the " reflow " you should replace the thermal paste with Arctic Silver #5 & I clean out the heatsink & fan before replacing them . Good Luck if you attempt the 2nd solution , I have done it about 20 times so far only 1 failure .
The video card in a laptop is a built in device, it isn't replaceable as in the case with PC workstations. Well, anything is replaceable. You would need to replace the motherboard would be my best guess, but that may not be cost effective, depending on the age of your system.
HP.com has complete remove/replace procedures with pictures in their free manuals downloads that would be better for you than me just writing. Do go slow and keep track of all of the screws as they vary in length and remove all modules first. If you need further assistance once you have the manual to follow then please repost.Good luck, Steve
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.