Blackberry pearl enter (push) function on the

I remembered an article some months ago which mentioned the coloring the of the Pearl's trackball by coloring the LED beneath the trackball. Finally I realized that removing the pearl's cover would the best way to get access to its sensor and clean it. By the way, this should work for all BlackBerry devices that carry a trackball around like BlackBerry Pearl, Curve, 8800, 8820 and 8830.
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.

it is because of the dust accumulate din between the trackball and the wheels...so remove the trackball and clean it....u can be abe to do it by your own... for assistance watch this video,to solve this problem http://www.youtube.com/results?search_query=blackberry+pearl+8100+trackball+repair&aq=f

the problem is with ur trackball ...its because of the dust that has been formed between the trackball and the switch behind it...so ,first open the ring of the trackball (it has been pasted with glue ..so no need to worry)then remove the trackball and clean the dust n again replace them...

The trackball dome and/or module is bad. Try www.bbmedic.com

try hard reset, the easiest way to do this is to remove the batter for 1-2 minutes and restart the phone, you will see a sandbox in the center of your screen. wait till it disappears and fully restarted. hope it works for you as it works for me.

When this has happened to me I've used one of those wet wipes or a Q-tip soaked with rubbing alcohol to clean it off. It usually takes a few wipes. Sometimes I've taken it apart and cleaned the trackball with the q-tip when it's gotten really bad.
Here's a link to show you how it's done:
http://www.blackberryforums.com/general-8100-series-discussion-pearl/113889-how-clean-trackball-your-pearl-8100-a.html

Take it where you bought it and try to get it replaced, saying it's defective. Hopefully you're under warranty, unlike myself who has a **** blackberry who's radio keeps turning off randomly and won't make or recieve calls without having to manually reconnect 'mobile network' hundreds of times a day. Your phone must have got really wet though because buttons and **** don't ******* unless exposed to extremly wet conditions (trust me, I know). I'd like an iphone over this **** for damn sure but i'm stuck with any annoying and fairly useless phone for now.

just reset the device and chill. see that no key is left pressed accidently

I have had similar problems to this. It could have something to do with the trackball. I had been I found that by removing the trackball I could key in the password and the Blackberry behaved normally again. Then I reinstalled the trackball. Here is a link on cleaning the trackball.

Daniel

try takign out the batery if that doesnt work click it a bunch of times to losen it up