I'm having the same problem as you are, i believe... I had cm11 (or 10, not sure) installed for about a month now (back in december) .... Went on a trip, and when coming back my phone battery ran out at the airport... I take my phone home, not really giving it much importance, and i noticed it would never charge and/or turn on, and that when I connect it to the pc, nothing happened other than the white led coming on.. RSD won't recognized it...
So i found out i had to charge the battery manually, and used a Universal Charger... Still, no recognition by RSD Lite...
Finally, i found a way:
1. Open RSDLite
2. Connect phone (no battery on it)
3. While holding Power + Vol Up, put the battery in
4. RSD will recognize your phone!
Problem is, it recognizes my MB525 as "S Flash OMAP0360"
And when i try to flash a .sbf i used previously to recover my phone (had bricked it by trying to change ROMs in a sloppy manner), it seems to flash smoothly, but when it's going to reboot the phone, the progress goes up to 100% and then asks me to reboot it manually.. I read somewhere that to fix that i should take the battery out, disconnect the phone, put it back in, and make RSD recognize it like i mentioned before...... and after RSDLite says flashing is PASSED, the phone still won't turn on... I have tried at least three times and gotten the same result... Help?
I don't know if i should make a thread of my own.. i think we have the same problem, and i REALLY need my phone back.. so i guess we could just help each other fixing it somehow....
The SBF i am using (because it helped me save my phone before) is:
EDIT: Also, i read somewhere that when all you get is the white led (when connecting to PC) it means that your battery is not charged enough for flashing.. ?