Compaq Evo N1015v Keyboard Intermittent Problem

Hi All,

I have a Compaq Evo N1015v laptop with an AMD AthlonXP proc. and Win XP SP2 installed.

My problem is that the keys on the keyboard stop working intermittently.
Keys that do not work - 4,5,r,t,f,g,v,b and the left side windows key.

Sometimes these keys just stop working when I am typing something and then start working all of a sudden. I do not want my laptop suddenly freezing up. Any help would be appreciated.

I have already updated the system BIOS to the latest version and the keyboard controller firmware also that was available on the HP website.

Thank You.
-Chaitanya
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ChaitanyaKhaladkarAsked:
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rindiCommented:
This looks like a defective keyboard. If your notebook is still under warranty, get it repaired for warranty, otherwise try to get a new keyboard. You can also try removing the keyboard and then use a can of compressed air to clean it out, and make sure the cables where it connects to the mainboard are attached properly
ChaitanyaKhaladkarAuthor Commented:
Hi rindi,

The laptop is not under warranty. The keyboard has already been replaced once for this laptop. The guys at the support centre are unable to pin-point the exact cause of the problem; their suggestion being to replace the motherboard. I'm not sure how effective that is.
Can I try something myself?
rindiCommented:
Just to make sure if this is hard or software, get a knoppix CD and boot with that, then use the PC with knoppix and find out if the problem persists.

http://knoppix.net
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MarkCommented:
You may also try an external keyboard for confirmation of the problem.
ChaitanyaKhaladkarAuthor Commented:
Hi sparkmaker,

I tried using an external keyboard. It works fine with the external keyboard.
ddrdanCommented:
Do the F3 & F3 keys also work intermittant. Tracing the line back to the keyboard ribbon cable I find those keys are also associated. Your right hand "ALT" key should have the same problem too. Check the ribbon cable at both ends for connection. Pull the ribbon and inspect the contacts. Make sure it is seated well inside the ZIF socket. Look for abbrasions that have worn thru the ribbon contacts. Clean the contacts with an alcahol wipe.

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ChaitanyaKhaladkarAuthor Commented:
Hi!

Thanks for all your help.

I think rindi's suggestion of cleaning the keyboard and ddrdan's suggestion of cleaning the contacts helped. It's been a day and the keyboard is still working!

Thank You.
Chaitanya
rindiCommented:
your welcome
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