Need help - Stuck on static red logo
I was browsing the web on dolphin browser and my XT890 simply froze. After 5 minutes, I held the power button + volume down + volume up and the phone rebooted, but it got stuck on the red M static logo. Had to open the phone and disconnect the battery connector from the PCB so I could turn it off. Here are the facts:
1) Stock rom, 4.1.2 JB;
2) Can't get into fastboot menu;
3) With the phone turned off, after connecting the battery charger I can see the battery charging screen.
Because of 3) above, I don't think the phone is dead. Can any of you guys help me?
Thanks in advance.