The volume on my sons leapster does not work even if we press the up volume button

I had same problem, just fixed it by a little hack. The volume up switch is broken.
1. Remove accessory door on bottom. 2. Remove all screws on back. 3. Open back cover.
Looking at the exposed board, there are 2 volume switches (back to back). Directly next the switches are four contacts: the upper 2 are for volume down, the lower 2 are for volume up.
4. Place the battery pack on the board and hold it down. 5. Press the power button to turn on the unit. 6. Use a small wire to jump the volume up contacts multiple times to change the volume to maximum (or desired level). 7. (Optional) Remove the volume buttons and throw away the rubber cushions to prevent the volume from changing. 8. Replace everything back in place.

I had same problem, just fixed it by a little hack. The volume up switch is broken.
1. Remove accessory door on bottom. 2. Remove all screws on back. 3. Open back cover.
Looking at the exposed board, there are 2 volume switches (back to back). Directly next the switches are four contacts: the upper 2 are for volume down, the lower 2 are for volume up.
4. Place the battery pack on the board and hold it down. 5. Press the power button to turn on the unit. 6. Use a small wire to jump the volume up contacts multiple times to change the volume to maximum (or desired level). 7. (Optional) Remove the volume buttons and throw away the rubber cushions to prevent the volume from changing. 8. Replace everything back in place.

How did you try recaibrating? I just fixed my son's Leapster 2 a few minutes ago. I read a couple different recalibration instructions and the one that works for the Leapster 2 is:
1-Hold down the (?) Hint button while turning on the system.
2-Keep holding it down until the Leapster menu shows up
3-Let it go and press the A button
4-Touch each crosshairs x with the pen tip
5-When it goes back to the menu screen, restart the unit

We have the same problem and our leapster is only 2 days old.Do Touch Screen Calibration,it should help.I do it everytime for my son when he wants to play and it does help...But once u turn leapster off,u'll have to calibrate it again next time...
Just hold down hint button while turning on.When the Leapster menu screen appears,press the A button.Touch each of the crosshairs that appear with the stylus.restart unit. ..That what we do everytime.

Hi, have you tried to recalibrate the screen as in your instructions?
Make sure you have no game inserted
Press and hold down the 'on' button and 'hint' button (with questionmark on it) at same time until a menu appears on screen
Press A
Now touch all the little crosses with your pen that appear on the screen
switch leapster off and restart
if still not working, repeat above

Press the ? button and hold it while turning unit on.
Press the "a" button to select touch calibration
Press each + with the stylus
Restart machine

Press the ? button and hold it while turning unit on.
Press the "a" button to select touch calibration
Press each + with the stylus
Restart machine

Buy another one from the same store and just swap them.

Got my son's to work. Used these instructions.

Question Why doesn;t my Leapster2 respond to the stylus pen? Answer If your Leapster2 does not respond to the stylus pen, it needs to be calibrated. Calibrating the Leapster2 is easy:
1) Ensure that a cartridge is not inserted 2) Hold down the Hint button while turning the unit on 3) When the LEAPSTER menu screen appears, press the A button 4) Touch each of the crosshairs that appear with the stylus 5) Restart unit

An easy fix....

Press the ? button and hold it while turning unit on.
Press the "a" button to select touch calibration
Press each + with the stylus
Restart machine

Le voila!