multiple keys entering with keyboard

[RajGeo]

Hi,

I m facing an issue with 640 G1 laptops ,   keyboard being entered multiple letters

ie,   the following keys are entering along with the other key same time.

pressing key                                           what I m getting in screen

w                                                                  xw

x                                                                   xw

e                                                                   ce

c                                                                   ce

i                                                                    ,i

,                                                                    ,i

o                                                                   .o

.                                                                    .o

I have tried by replacing keyboard,  updating bios,  re installing windows,  even tried by replacing motherboard.

I faced many of this keyboard problems with same models  at least 3 or 4 laptops

Any clues?

TIA

[kelmers]

1st step - test an external keyboard, to see if it follows the OS, or the internal keyboard itself.

If the issue does not occur with an external keyboard, Drivers and OS can be ruled out.

Follow the steps starting on page 75 for removal of keybaord, in the maintenance and service guide, found here:
http://h20566.www2.hp.com/hpsc/doc/public/display?sp4ts.oid=5405392&docLocale=en_US&docId=emr_na-c04...

After keyboard removal, check for any cuts or tears along the keyboard cable. 

Upon reassembly, ensure that the keyboard cable is properly seated within the ZIF connector on the system board.

After reassembly, if the keyboard issue still exists, I would recommend replacing the keyboard again.

[RajGeo · Accepted solution]

Many thanks for reply,

I have solved the problem by replacing function board switches ( wireless, mute button). Took long to find it out.

any way refference for future

thanks

Rajish