Screen not responding to touch

Have you already performed a clean reset? You might know that it will restore your device to its factory settings, thus deleting everything you have installed, as well as your personal data and settings. So, it is strongly recommended to backup your data beforehand.
Anyway, to perform a clean reset, press and hold the Calendar, Power, and Messaging buttons, and, whilst keeping them pressed, press and hold the reset pin with the stylus pen. When your device restarts, release the buttons and the stylus pen from the reset pin.
Hope it works for you.
Cheers! Carlos

the touch screen plug on the motherboard is disconnected

Have you tried a hard reset (deletes everything)

1. Press and hold down the Calendar and iTask buttons.

2. While holding down these buttons, use the stylus to lightly press the Reset button on the bottom of the iPAQ Pocket PC for about two seconds.

3. When the Pocket PC screen begins to fade, release the Calendar and iTask buttons first, and then remove the stylus from the Reset button.

4. The Pocket PC resets and powers on.

Try using your finger to calibrate the screen at first. (If you have difficult to navigate to the alignment screen use the stylus & keyboard to feel out your way) when calibrated to an accepable degree use the stylus to calibrate the sreen, if the target doesn't respond to stylus at any specific piont use your finger. Continue this process till u get it aligned as best as possible. I suspect this problem is caused by specific points on the screen going bad.

here is your answer
but if you want to solve your problem quick
microsoft takes 11$ to fix it

see this if this help you

Resetting the Device

Sometimes there is a need to reset your Pocket PC. Resetting the
device is known as performing a "soft" or "hard" reset.

Performing a Soft Reset

A soft reset stops all running applications, but does not erase any
programs or saved data. Be sure to save any unsaved data within
a running application before performing a soft reset.
Perform a soft reset to:
■ Stop all running applications
■ Install a new application
■ Restart the Pocket PC if it stops responding

To perform a soft reset:

1. Locate the recessed Reset button on the bottom of your iPAQ
Pocket PC.
2. Use the stylus to lightly press the Reset button.
The Pocket PC restarts and displays the Today screen.




Performing a Hard Reset

Perform a hard reset only when you want to clear all
user-installed settings, applications, and data from RAM
(Random Access Memory), where data and applications you have
loaded are stored.

CAUTION: If you perform a hard reset, your Pocket PC loses all data
and programs not saved in iPAQ File Store.

To perform a hard reset:

1. Press and hold down the Calendar and iTask buttons.
2. While holding down these buttons, use the stylus to
lightly press the Reset button on the bottom of the iPAQ
Pocket PC for about two seconds.


3. When the Pocket PC screen begins to fade, release the
Calendar and iTask buttons first, and then remove the stylus
from the Reset button.

Note: If you simultaneously push and hold the Reset, Calendar,
and iTask buttons for more than two seconds, the battery
disconnects. To restart the device, either plug the device into the
AC Adapter or press the Reset button again.
After performing a hard reset, you may need to reinstall
applications stored in iPAQ File Store to restore shortcuts and full
functionality.

4. The Pocket PC resets and powers on.

To return your iPAQ Pocket PC to factory settings after
performing a hard reset:

1. Tap Start > Programs > File Explorer > My Device.
2. Tap the iPAQ File Store folder to open it.
3. Tap Edit > Select All.
4. Tap and hold the selected files, then tap Delete.
5. Tap Yes to delete all file in iPAQ File Store.

Hello and sorry for the delay.

the h1945 series is a very intresting pda. I have seen all sorts of problems relating this one. There are some things you may want to try. Based on that knoledge I may be able to find what's rong with your unit.
First, check if the back cover fits tight on the back of the unit. It's important because on some ipaq models, there is a small micro-contact that doesn't allow the unit to power on if the back cover isn't attached. I'm not sure if the 1945 has one, it's been 2 years since i've last phisically repaired one of these, but you may look for one yourself. It's a small contact near one side of the back opening, check to see if it can be pressed. If you don't have anything like this just ignore this tip.
Second, leave the pda connected to the charger for about 6 hours. Even if it doesn't do anything. Then try to start the bootloader by pressing the 2 outer keys near the D pad (simillar to the hard reset procedure) then, while keeping those pressed, press the power button and in the same time press the soft reset button with your stylus. You must do this with your charger connected to the pda. It may be difficult to achieve in the first try. Just try to do this a few times and if the pda doesn't respond even now, please post back. Furthermore, if you need more info about these 2 tips please reply.

SOLUTION:

KEEP PRESING CALENDAR+MAIL+POWER BUTTON
AND INSERT STYLUS IN RESET BUTTON

Try do a hard reset to your device to the deafult vendor definitions, then re-initilize the screen and this should help.

Are you displaying all categories. Does the second line of screen say 'All Contacts'?

On the opening screen of iPaq Backup there's a line, "File," where the backup's filename appears, and a little box with 3 dots. Tap that little box and you'll get a menu allowing you to set the location.