Trackball issue The trackball on my bb 8310 stopped working properly today. it moves in all directions, however, it will only scroll "up" on screen, it will not scroll "down", even though the trackball moves in that direction. i"ve tried rebooting (batter removal), but didn't work. I have not dropped it nor has it been in water, this problem just started out of nowhere. Thanks!

The silver ring which covers the trackball can easily be removed if you use a small screwdriver to lift it at the outer side of the ring. Be careful here! Like you should be during the whole process as all parts have very small plastic nipple which can break very easy. When the silver plastic ring is removed you will see the inner trackball component which can be removed completely. Before doing this you should carefully remove the silver metal ring that holds the trackball component in its position. The trackball component itself can also be carved. For every direction the ball can roll to you’ll find a sensor wheel. Those wheels are mostly carrying some gunk you should clean them from. Once this is done put everything back together to the place the pieces came from and secure the trackball with the silver plastic ring you removed in the first step. Your BlackBerry’s trackball should be back working now.

YOU NEED TO CLEAN JUST SENSOR WHEELS NOT BALLS ITSELF.

BlackBerry Pearl Trackball Cleaning Screen Shot

This I found out how to fix today!
Take out the trackball... you probably know how to do that..
Be careful with the ring, the little pegs break easy...
Keep the trackball to the side in the same direction it went in (maybe it matters, but to be on the safe side).
Then look inside... you'll see a little brown colored looking sticker thing... it looks like a microchip or something but it is only tape that covers the contact piece. With a knife or something small you can peel this tape off and the (i call it a popper) will come out. Clean that thing really good and clean the metal contacts that were covered .
Then be sure to put it back on the same way it came off... Use your pinky or a small stick to put the tape/piece back in.

Mine worked GREAT after that...

Disclaimer: Do at your own risk. I accept no responsibility for damage to your Blackberry.

You can get a New trackball from www.blackberry8100parts.com

$6 last time i checked

Try blowing the trackball and wiping it off with a shirt or something, when i get dirt or grease in mine it will freeze up but this fixes it