Were you using OS 3.1 before ?
I can't be sure of what I'm going to say but maybe it is a clue : when connected to the PC, the Nspire won't turn Off automaticly (true) whereas unplugged it enters standby (IIRC).

Remeber that your Nspire (any model) can is powered by USB (you can remove the batteries/accu if you wish check).

Yes, my Nspire came preloaded with OS 3.1 as I had just purchased it recently. Just to elaborate the calculator also had absolutely no problems standing by or dimming until Ndless was installed, and reverts back to having no problems when I uninstall it.

After a week or so of use in class, it still fails to standby most of the time no matter what setting I put it on; though dimming has seemed to work consistently of late.

Quote from: Logo98 on January 27, 2012, 03:53:44 am

Has anyone else had issues with their calculator not going to sleep after ndless 3.1 was installed on the CX?

Yeah, for me it's working from time to time....

Quote from: Logo98 on January 27, 2012, 03:53:44 am

I want to uninstall/reinstall to see if the problem is fixed, but I have not seen anything regarding whether the uninstall works right or not.

You can uninstall Ndless safely by running ndless_resources

After I uninstalled ndless and deleted the resource files, the calculator begun to go to sleep again and the screen dimmed properly when it was supposed to. However, after I reinstalled ndless, the problem returned. The screen will only dim sometimes and I don't think the calculator has ever gone to sleep since.

 I suppose I could uninstall and than reinstall ndless whenever I need it, but I think I'll be using it too much to make that solution worthwhile. It's not really a big deal anyway; I just don't want to forget to put it to sleep and have my battery drained right before a test or whatnot. Hopefully the author(s) takes note of this issue and looks into it while developing the next version.