Touch screen stopped working on my palm treo 650. all other functions work. just the touch screen don't.

You can use the Unlock code to Unlock Your Palm-One Tero 650 model Phone,You can get the Unlock code from here
Wickedunlock and follow the instructions and Unlock it step by step..
Palm One Treo 650 Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Palm One Treo 650 mobile phones. If you enter over a certain amount of wrong unlock codes on your Palm One Treo 650 mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Palm One Treo 650 with an ACCEPTED SIM Card,
2 - Go to Menu and select "Phone Tool" or "Phone Application",
3 - Type on Virtual Keyboard *#*#CODE#,
4 - Select with PEN "Numer" and Palm One Treo 650 will show that it's unlocked now!

or

1 - Switch ON your Palm One Treo 650 with a NOT ACCEPTED SIM Card,
2 - Enter the Unlock Code we send to you.

or

1. Remove Palm One Treo 650 battery, unplug cable,
2. Switch ON your Palm One Treo 650 with a NOT ACCEPTED SIM Card,
3. 'Sim not allowed' is displayed, click OK,
4. Go to the dial pad, and dial *#*#CODE#,

CODE: The unique unlock code for your Palm One Treo 650.
ACCEPTED : We mean, to use a sim card from the network your Palm One Treo 650 is locked to.
NOT ACCEPTED : We mean, to use a sim card from a network other than the network your Palm One Treo 650 is locked to.

Hi, well you could reinstall the Firmware again, you could restore to factory settings, you could reinstall the software and drivers again for the camera only. Of course ONLY after backing up fully first.
http://www.hpwebos.com/us/support/handbooks/treo/treo650gsm_UG.pdf

Above is your user manual, look in here for assistance,as to how to perform those tasks.

Go to applications - preferences - touchscreen. Follow the instructions to calibrate your touchscreen. If it does not work, reset your phone by pressing the small button at the small hole at the back of the phone with a safety pin.

I believe that serial numbers are different for everything and that only model numbers stay the same. Most likely, the screen will work.

recalibrate the touch screen

Call your service provider.

Have you reset the unit by taking the battery out? Power it up after doing so, just like a home PC - it should work again.

If that does not work, the touch screen driver may need updating...

- J.

make sure the ribbon is snugly connected.
sometimes it appears as if the ribbon from the display to
the circuit board is connected, but if you push on it, it snaps into place

buy new battery nimh in ther sit so long loses full charge cant get back .

I was able to find many parts for my 700w on ebay including keyboards. You should be able to find what you need too and the keyboard is a sinch to remove and replace onew you have the two needed tools to open your phone, the T-6 screw driver and a cover removal tool that help unsnap the cover which is a bear to do without the tool. Do an ebay search to "Treo Cover tools" or "Touch screens for Treo 650" and you should find all you need.

Robert R.