Ez segít rajta:
(amúgy google első találata )
Clearing cache and Dalvik cached worked.
1. Turn on USB debugging on phone.
2. Turn off Fastboot on phone.
3. Connect phone to PC in "Charge mode".
4. From PC (you must have adb and fastboot tools installed on PC), enter "adb reboot bootloader".
5. When you get the HBOOT screen on the phone, select FASTBOOT. Screen should display "FASTBOOT USB".
6. On your PC enter "fastboot boot <recovery>.img" where "recovery" is the name of a custom recovery (such as AmonRa) in the same Windows folder.
7. Once the custom recovery is booted, the commands to wipe cache and Dalvik Cache should be on one of its menus.