Sadly B&N has decided to discontinue the Nook Simple Touch and Simple Touch Glow. It's a shame as for a dedicated e-reader for my needs it was perfect. Perfect enough I own 7 of them, one for each member of the family and a couple of spares. The new model is a couple steps backward in my opinion and I'll only be picking one up assuming I absolutely have to.
One of the kids developed an issue where it would only run when plugged in. The battery appeared to be fine, it would charge and hit 100%. You could start it off the charger but a few seconds into the home screen it would lock up. Plug it and it would restart and be fine until you unplugged it where it would run for a few seconds then lock up.
I tried several things, a Erase and Deregister from inside the Nook OS as well as a 8 canceled reboot wipe and re-image. I even rooted it and tried different launchers.
In the end what worked was pretty simple. I popped off the power button and used one of those little screwdrivers you get with an eyeglass repair kit to remove the torx screw under it. The screw was covered with a little 'anti tamper' piece of paper but out of warranty and not working that little paper didn't scare me. If you're a proper nerd you might have the Torx 5 (or 6) driver for it. I didn't so I used what I had which worked fine.
You then push the back so it slides about 1/4" the it pulls right off. The battery is attached to the back and a power cable connects to the system board. Pop the power cord off of the system board and then press the tiny white button that's on the system board where the power button cover was and hold it for 30 seconds to discharge any lingering power.
Plug the battery back in and the nook should start up.
If you're lucky like me your NOok should be fine at that point. What you've done, I believe, is cleared the NST and basically told the nook it has a new battery.
Time will tell if this is a permanent fix but it's been working for a few hours now and I'm calling it good until proven otherwise. So if you're having this problem, don't throw out that Nook just yet, it might be a very simple 5 minute fix and you'll be back to reading in the sunlight and avoiding buying into the 'We'll delete your books any time we like" Amazon dicatorship.
Unlike many other tablets, ereaders etc, the Nook Simple Touch and Tough Glow are very easy to replace the battery and you can pick up batteries online for between $15 and $30.