After the system was upgraded to 4.0.3, the USB was old and the problem was caused by a USB data cable problem. Baidu later found that many people had such problems after the upgrade, so they thought of the upgrade. Just two days after flash
Download refresh File
Download and decompress the package, and check the instruction file.
After M is enabled, press the volume down key to display three modes (Android recovery, RDS, fastboot) Select fastboot and run the unlock bootloader. Bat command.
The machine will see a lot of English, then: Click the volume-(the last line of cancel is changed to I accept), then click the volume + (a paragraph of English appears ); next, press volume-(the cancel in the last line is changed to yes), and then press volume + (start formatting UDA, then restart and unlock bootloader)
The machine is initialized. In the setup wizard, set -- ApplicationProgramIn-Development-USB debugging mode, the computer can recognize the xoom
Then put the ROM in the SD card. Here it means that it is not the built-in SD card. It is an extended SD card that has been purchased for more than a year. If you do not pay attention to expansion, insert the SD card and place the ROM on the SD card.
Restart the flat panel (Press volume to press the up/down key + shutdown). When M appears, press volume to select fastboot and run the command to fl into cm recovery. bat.
Recovery covery is complete. After the machine restarts, you must press the key to enter recovery (this step is critical to the completion of root or a third-party room). Do not enter the system after restart or wait for the white re.
In this case, go to the RE menu and select "OK" at the beginning of "wipe" (the power switch is OK). Then, select "yes" (the system will be loaded continuously after it is not confirmed)
Select install zip from sdcard -->
Choose zip from sdcard --> select your Rom --> yes-install -(romfile name .zip)
Two days later.