I did receive a couple of reports about the APD not working anymore while using Ndless. But I don't have any clues whether it's Ndless-related or a side effect of some Ndless program. And I didn't manage to reproduce it on my Clickpad.

- Did you resinstall Ndless by upgrading it (a popup on the calculator side tells you that you are upgrading) or by reinstalling the OS, then Ndless?
- Does rebooting the CX fix the problem?
- Could you please  tell me exactly what are all the program you are using (the ones you run from the Documents screen and those you may have put in Ndless's startup folder)?
- Do you remember any change on your calculator between the moment the APD worked and the moment it didn't, expect the upgrade of Ndless?

Sorry to bother you _Nicco_ with all these questions (and maybe more to come), but as this issue isn't frequent this is a good opportunity to find the root cause and hopefully fix it.

I did receive a couple of reports about the APD not working anymore while using Ndless. But I don't have any clues whether it's Ndless-related or a side effect of some Ndless program. And I didn't manage to reproduce it on my Clickpad.

- Did you resinstall Ndless by upgrading it (a popup on the calculator side tells you that you are upgrading) or by reinstalling the OS, then Ndless?
- Does rebooting the CX fix the problem?
- Could you please  tell me exactly what are all the program you are using (the ones you run from the Documents screen and those you may have put in Ndless's startup folder)?
- Do you remember any change on your calculator between the moment the APD worked and the moment it didn't, expect the upgrade of Ndless?

-I didn't re-install the os or upgrade Ndless.  A while ago I uninstalled Ndless and just recently I felt like using Ndless so I installed the latest version of Ndless.  It did not tell me that I was upgrading either.
-I'm pretty sure that rebooting does not fix the problem unless I don't know how to reboot the calculator properly.  How would you shut down the calculator completely anyway because all I know how to do is put it into sleep mode by doing ctrl ON.
-All I remember was that I installed Ndless then loaded up polydumper so that I could get the boot files to run the emulator on my computer.  After that I noticed that it wouldn't sleep automatically.

My calculator, which is a CX CAS, still enters standby mode automatically still. Maybe you accidentally edited the settings?
[Home] + 5 + 3
Then power standby. Check it to make sure it's on one minute or something short, rather then 5 days o.O

I already checked that.  I have the screen dim set to 30 sec and the power stand by set to 1 minute.  Still nothing happens after one minute.

Yes, pressing the reset button should do the job. On OS <= 1.7 for Clickpad & Touchpad, it erases the memory, but not so on the CX (whose oldest OS version is 3.0.1.1753).