[Android Head-Units] Anton TNT:
Hello, try to format usb for two update files but not on a computer (windows), format it on laptop or other hand held devices or something, most units do not recognoize usb's in windows formating.

When formating, clickon default values, and partition tables must be on FAT32 only! Not NTFS, exFAT, linux swap or anything else.

When formated correctly then put those two update files on usb (xxx.bin and xxx.upd) and insert it in device prior to booting up device. Put ignition key in contact mode or better - engine on, as it will take a while to update.

Start tapping with one finger in center of screen till message DETECTED appears on left upper corner of the screen and wait for automatic installation to commence.

When unit boots up again after installing update, DO NOT interrupt update procedure till end , as most likely will end in boot loop or failed device with lost functions in memory (like in windows when computer shuts down and disk is still writing - then next bootup - FAILED). And do not remove usb from port till procedurte is finished.

If update went ok it will enter Android and that's it, if not try with other updates available for your headunit and this kind of model (download and update from ZIP FILE like CHS.8227L.8.android10.ver3.xxx.date - but look for specific interface model that must be right for your device - look file for first letters in update file CHS,XRCH,FSKJ,XRH,JC,JS etc.).

If update still not successful or usb isn't recognized again, press and hold center of screen with all five fingers till erase message appears. It will automatically erase system and initiate system recovery if has one. It will prepare system for update and erase hideen boot files for device. Then try with update again from USB.

But NOTE THIS !

After erasing procedure some of the factory settings may be lost also on internal memory (music, navi, settings etc.). After ERASING system must be calibrated again (in order to avoid wrong resolutions set or inverted screens etc.) aswell as phisical button configuration if unit have one (for this I have a zip file ready but it must be same model as mine ALPS FF5000 device with model/chipset AC8227L). Phisical button settings can be imported from factory settings - menu KEY. Touch buttons can be imported aswell thru menu TOUCH STUDY.

Everything else - set in factory settings afterwards - menus like RADIO, OTHER, TCON, LOGO, MCU update etc.

And finally - factory settings - menu OTHER - INTERNAL MEMORY write (LAST STATE REMEMBER must be on settings ON and PROTECTION setting OFF - INSTALL option is always ON - must be correctly set !

Third method (last resort and a bad one to consider , but this is provided "as is" and can't guarantie for success , may brick your device and then you must flash ROM - from scratch and connected to a PC) is at YOUR OWN RISK!

"Wipe Cache Partition" or "MEMORY WIPE" or "FLASHING DEVICE / ROM"​

Search and download from this forum recovery files and ROM files for flashing.

Procedure is written also in various threads across forum.

Go into Recovery Mode using the key combination that works for your device (search net for them).

You can then use the Volume buttons to navigate and make your selections.

Choose the option to Wipe Cache, then return to the Main Menu and choose Reboot System Now.

Wiping the Cache will be available under the Advanced option if you have installed a custom recovery, and could prove very helpful if you have recently tried to flash a new ROM.

Also visit Storage and Wipe Data as well as Wipe Cache there.

The majority of the time, this solution will fix your Android boot problem.

As works for Android phones most likely will work for car multimedia devices with android installed.

I know it's a lot to try but try and see if works.