MacBook 4,1 Keyboard/Trackpad don't work

[mjgillen]

Hello all,

I've searched around but haven't found a cure. I have a MacBook 4,1 2.4GHz 2GB RAM running 10.6.6 and the keyboard and trackpad don't work. The power button does so I can turn it on but no joy on kbd/trackpad. I have swapped it out with two other known good keyboards but nothing has helped. I have checked Boot ROM and SMC versions and they are all up to date. I have done an SMC reset but cannot to a PRAM reset as the keyboard does not work.

One other note - I reinstalled 10.6.3 from scratch (erased hard drive) and when it booted into the OS it said I did not have a keyboard connected at all and that I needed one connected. I connected one and it boots to OS but still does not recognize the on-board keyboard. Any help appreciated.

Thanks,
Michael

 

[mjgillen]

OK I connected an Apple USB keyboard and was able to do a PRAM reset and still no joy.

Any other suggestions?

Thanks,
Michael

 

[Naimfan]

Could be the ribbon cable or, sorry to say, the port on the logic board that it connects to. Can you run hardware test from the original restore discs?