[karynh]

I bought a Nexus 7 from Ebay. I charged it. I tried both the wall outlet (the light on the outlet plug did not turn on) and the computer to charge it. It will not turn on. Is it because I don't have a SIM card in it? It was brand new, sealed in the box when I got it.
Thanks

[SpookDroid]

Hi Karynh,

No, you don't need a SIM card on ANY device to make it turn on. I would check if your charger is actually working or try to find a compatible one (any microUSB charger with over 1A of output current should do it). As a general rule of thumb, PC USB ports will not have enough current to charge your tablet.

[B. Diddy]

Welcome to Android Central! How long did you charge it before you tried to turn it on? Keep it plugged into a wall outlet for a good 6 hours or so before trying to turn it on. If it still doesn't work, try a different cable/plug--you should be able to use any microUSB cable and charging plug from any other device you have.

Keep in mind that just because it came in a sealed box, it doesn't mean it was brand new. It's relatively easy to repackage a used device and make it look new.