Question:
hp pavilion dv2020us(dv2000) has blank screen (black) due to defective lid switch
I've had this problem with hp pavilion dv2020us entertainment (hp pavilion dv2000): the screen was blank all the time (ie. no backlight) and the mouse(touchpad) was disabled. Sympoms are just like when the lid switch was closed (ie. when the display lid is closed the touchpad gets disabled). The lid switch is inside the laptop on the right; but it can only be reached if the laptop is disassembled. It took me 7 hours to fix it and I did that by unplugging the cable of that switch such that the switch is now seen as always open(ie. make the switch stay open by unplugging it's cable from the board); this plug is located near and under the F8 key; you will have to remove two layers: the keyboard and another aluminium layer which is part of the outter cover just below the keyboard where you keep your hands when typing(yeah that cover).
I advise against disassembling the laptop; you'd be better taking it to service! It seemed unavoidable that i could open it without breaking small plastic things that are part of the covers. Besides there are two screws just on top of the dvd-rw while it is open that keep the top cover in place and you cannot pull the dvd-rw out: i had to eject the dvd-rw by a needle then crack('cause i couldn't pull it out) the part of the dvd-rw which has the eject button such that i could insert a screw driver from below between the crack and unscrewn those two screws while the dvd-rw device was almost closed(injected). Also there's a screw right beneath the keyboard that keeps the cover in place; small plastic things that keep covers in place are most likely to crack(break) while using the screwdriver ...
Of course now that the lid switch is always open(not connected) the display is always on while the computer is on(unless the computer is in standby)
The switch is such that if you pressure the bottom part, on the right side of the display holder- there are two display holders - dno the word for them) then the plastic switch(which is inside again) gets pushed to a metal actuator and the switch button may get inside the switch such that it will break or get stuck so the switch is always on(meaning the display lid is closed and thus the display is off - no power/backlight)
However if you get a flashlight and point it to the screen you can see dim colours and the shapes of the windows and text (suppose you have Windows on it) [thus the computer still works, forgot to mention that - it was obv.). The flashlight should work on all displays that are off due to a lid switch or defective backlight. Try running explorer with Winkey+E and a white window should appear and you should see it's shape even on the light of the room if you get closer(and from some point of views).
My guess, transportation can get that lid switch damaged(apparently this was the cause in my case)... and the screen will always be off; keyboard is still usable; some may try Fn+F4 which switches between laptop's display and CRT or both of them at the same time(ie. of course you could plug an external monitor on the VGA D-sub on the left side (three rows of fem.dots)
More about the lid switch? well you'll have to remove the display cover and the two other covers under this (the second one is the speaker cover) also the keyboard and ... the pad cover can only be moved a little to the right to be able to unplug the switch from the motherboard(near F8 key - or around there); the switch is near and under the right part that holds the display connected to the laptop; and it has two screws but you cannot manage to unscrew them unless you remove the hard metal parts that really keep the monitor attached to the laptop(which I didn't do).
The keyboard is kind of tricky to put back because it has to be under 4 metal protuberations (2 on the left and 2 on the right) that are there for some purpose other than making your life a result of your past.
Again, please do think 3 times before disassembling the laptop (in general, any laptop) because you may regret it when you see how it looks on the edges afterwards (because of the screwdriver insertions in attempts to unlock the small plastic things that keep the covers in place - yes the plastic things that eventually, or at least 20% of them, get cracked/broken).
Hope this helps in any way.
ps: this laptop was not mine.
Answer:
Re: hp pavilion dv2020us(dv2000) has blank screen (black) due to defective lid switch
can you post some pic on how you unpluged the cable of the switch?? i have the same problem ... when i plug it with ext monitor it loading fine, but if it starts with the laptop LCD there is very dim text also the keyboard work fine... I disassambled the laptop but still couldnt find the connector. (also try all other method but now use)
btw, i have hp pavilion dv1100 CTO, hope you get some update soon cause waiting for hp service may just take forever ...
thx emacs
Answer:
Re: hp pavilion dv2020us(dv2000) has blank screen (black) due to defective lid switch
What is the action that triggers this issue? Why would the lid need to be closed when the computer is in a 'On' state?
Answer:
Re: hp pavilion dv2020us(dv2000) has blank screen (black) due to defective lid switch
ei, you save me EMACS, thank's a lot! This tip is working confirmed! On HP Pavilion dv2000,
The lid connectior is under F7 and F8 button on keyboard, I removed only keboard, without removing anything else, you can reach it without removing aluminium layer, only need to remove keyboard.... and indentify lid connector (it is two wires i think the color was red and black )
Thank's again!