What's wrong with my device? It powered off even with batterly life left and won't turn back on even when plugged into the charger.

If a little lamp is lit when you plug in the charger (indicating that the device is charging), then try holding the power button down longer until something appears on the screen. If no lamp is lighting when you plug in the charger then there is something else wrong. Check it is the right power supply for the device and that you are plugging into the correct hole of the device (not the earphone connector). It also may be the charger itself is not working.

Unplug all devices, USB sticks, SD cards, anything it has plugged in. Then plug the charger in. Do not turn it off unless it takes over 8 hours after you put it on the charger. If you do turn it off at any time, even after the 8 hour mark, I claim no responsibility for the consequences. However, I have powered off devices in this state many times, and nothing has gone wrong.

I've had the same problem with my RCA 10 inch tablet. I have charged it, tried the hard reset, used different chargers and even different outlets, and held the power button on for 60+ seconds with NO RESULTS! My recommendation is to contact RCA, which is what I am doing, and request an immediate replacement if yours is still under the 1 year manufacturers warranty. If you look these tablets up, you will see (as I have found) that this is apparently a common problem with the tablets. Wish I had known that prior to purchasing!

Turn it completely off. The reason its hot andvfreezing up is two words, Youtube!!
It ttrying to watch, download or even send. Its too Much for it to be able to do. Next time turn your device off. That will stop the Rams from jamming everything ,freezing everything. But just reboot by pressing and holding the powerbutton until the device turns off and comes back on. When it turns back on release the power button.

Her is a possible solution:
1. Plug into the original charger, hold the power down for a full 30 seconds, release. Let charge in this state for 12 hours.
2. Lease the device plugged into the charger, while you have the device plugged into power, press the power button for a full 40 seconds, release. Wait for 5 seconds and then press and release the power button. Did the device wake up? No, continue to step 3.
3. Plug the device into another charger, if you do not have an charger from another phone go to Staples or Radio Shack pick up a new Kindle or Universal charger, make sure you can return the charger.
4. Plug the Kindle into the new or alternate charger. Hold down the power button for 30 seconds release. Let charge for 12 full hours.
5. Unplug the Kindle from the charger.
6. Press the power button for 40 seconds - time it. Release the power button, wait for 5 seconds, then press and release the power button. The Kindle should wake up. If not, proceed to step 7.
7. If you can not wake up the Kindle from a 'hard reset' the Contact Amazon directly for a replacement.

Have you tried a different adaptor or power outlet other than that the dc jack on the notepad may need replaced

you had to plug it in the charger for a while and then you hel the power button for more than a minute

if it not work hold power button and volume up for 20 sec.

Sorry to hear/read this.
First, try get a new charger and plug your Google nexus 7. Suspect a dead battery with no charge left on it.

Otherwise, confirm your charger isn't just lighting up whereas it isn't delivering any charge current to your device.

Next to try if your ac charger is confirmed good is to attempt replacing the battery; at the store, have them insert a compatible/similar battery and then try power on your device.

NOTE:
New batteries at the point of purchase have some charge on them; sufficient to power on your device.

Device not power on, DON'T PURCHASE NEW BATTERY. Obviously, you don't have a power/battery problem.

Device power on, then you either have a battery that has failed or that your device's charging port needs to be serviced or repaired.

Please post update/feedback asap. Thanks

it has a fault bring it back