[OreoCookie]

I've had my ProBook's harddrive replaced three days ago (I have AppleCare, I could have done it myself, but I didn't feel like voiding the warranty). Two days later, the Down and Right cursor keys stopped working. Is there something I can try before having it fixed? The repair won't cost me anything, but I'd still have to go to the shop and all -- which costs about half a workday.

Any ideas to get them going again? The keys aren't jammed nor do they feel different.

[Cold Warrior]

I always try a PRAM zap whenever I get hardware responsiveness issues.

[OreoCookie]

It's not a responsiveness issue, the keys have stopped working at all.

[dowNNshift]

Hopefully the technician that worked on it fully reseated the main keyboard/trackpad/ALS sensor/power button cable.

I've come across this problem on a few customer machines lately. When you flip over your MacBook Pro and remove the battery, you'll notice a clear cover over three delicate ribbon connections. The largest of the three controls the keyboard and sometimes needs to be cleaned and then reseated.

The best way to test to see if any keys are shorting is to let the Apple Service Provider run the Service Diagnostic on the keyboard. Basically every key gets pressed and it flags stuck keys. If keys are continually shorting even after reseating the top-case ribbons, then likely the whole keyboard assy will be replaced.

Just visually inspect that they weren't rough on those above mentioned connections. Unfortunately you have to completely remove the top case to access the master connection.