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Tutorial Tutorial - how to recover / unbrick the U9

Discussion in 'NEO U9-H Guides & FAQs' started by wrxtasy, Jun 6, 2017.

  1. wrxtasy

    wrxtasy Well-Known Member

    I've been playing around with LibreELEC S912 development on the U9 and went to "reboot to internal", which is normally reliable and all I could get was a black picture video output from the U9 when trying to boot into Android from that point onwards.

    I've seen this before when Android devices with HDCP - copy protection - where the Keys get corrupted and then you can get no video & sound output out of the device at all.

    Anyway this is the quick fix recovery method (should work on all AML Android devices):

    1) Save this code to a plain text file called factory_update_param.aml (there must be no .txt extension)
    Code:
    --wipe_data
    --wipe_cache
    --update_package=/udisk/update.zip
    2) Download whatever U9 Firmware file MINIX are currently using - eg U9H_FW004A.zip
    Rename this to update.zip

    3) Unzip the file in Step (2) and extract the recovery.img

    4) Save these 3 files to a USB Stick:
    factory_update_param.aml
    update.zip
    recovery.img

    5) Unplug the power from the U9, insert the USB Stick. Plug in power again and then press and hold in the power button for at least 6 seconds. The TV screen will still be black, but...

    I could see a flashing LED on my USB stick, indicating activity. And after approx. 7 minutes the MINIX desktop appeared again with all my Apps still intact. (y)

    W.
     
    shablamy, olive069, steveg32 and 5 others like this.
  2. steveg32

    steveg32 Active Member

    Hi. Will this fix my problem?
    http://www.minixforum.com/threads/u...arting-screen-wont-boot-up.17496/#post-140256
     
  3. Villa

    Villa Administrator Administrator

  4. steveg32

    steveg32 Active Member

    There is no .zip file yet for U9H_FW006 - only .rar - and there is no recovery.img file in the Full System Image DL. Is it safe to use FW005.zip over my FW006 with your method or should I wait for 006.zip ? I have files that I really don't want to lose by doing a full factory reset.
     
  5. Villa

    Villa Administrator Administrator

    If you want to try this you will have to wait for the FW006 .zip file.
     
    steveg32 likes this.
  6. steveg32

    steveg32 Active Member

    Ok. Thanks. Will it be available soon?
     
  7. Villa

    Villa Administrator Administrator

    No idea! :(

    What type of files do you have on the device that you don't want to lose?
     
  8. steveg32

    steveg32 Active Member

    Thanks for your reply @Villa. I think @MINIX - Ken mentioned the other day that they were in the process of uploading it (though he might have been referring to the Full System Image .rar).
    http://www.minixforum.com/threads/neo-u9-h-fw006-20170810.17461/page-2#post-140118
    Mostly files & settings with paid sub services that I really don't want to lose and have to reconfigure again. In the interim, I'm using my old Rockchip (4-Core RK3188 1.42 GHz Mali-400) Android 4.4.2 box. It's a step down but it has NEVER crashed on me yet.
     
    Last edited: Aug 20, 2017
  9. steveg32

    steveg32 Active Member

    Fyi, this recovery method did not fix my issue nor did a manual update using the U9H_FW006.zip. Had to Factory Reset. All is well again. But thank you for this thread @wrxtasy. It was definitely worth the try.
     
  10. Noodlebug

    Noodlebug New Member

    Fantastic. Tried every other method yesterday until I came across your post.
    Worked first time.
    Thank you.
     
  11. David Bucknell

    David Bucknell New Member

    How to return to the (tiled) MINIX desktop?
     
  12. Villa

    Villa Administrator Administrator

    Settings, Advanced Settings, Home
     
  13. David Bucknell

    David Bucknell New Member

    Many thanks Villa, can l ask you how can l get apps from all apps to my home page?
    Thanking you in anticipation.
    Regards,
    Dave.
     
  14. Bmur06r1

    Bmur06r1 New Member

    Can some one please help me I’ve tried to get into the recovery mode by holding the power button for over six sec and nothin happens can some one please help me

    Thanks Brandon
     
  15. Villa

    Villa Administrator Administrator

    Is that with the device powered off?
     
  16. Bmur06r1

    Bmur06r1 New Member

    Yes it was I figured it out I had a TF card in the card reader thank you
     
    Villa likes this.
  17. extrawing

    extrawing New Member

    Hello,
    My box (U9-H) cannot boot anymore, it looks as completely dead.
    It worked fine for a few days, but after a few of weeks in switched-off state (power adapter was disconnected) it cannot boot, no HDMI signal.
    Never ROOTed or modified in some other way.
    The firmware most likely was FW008, since this is the latest one and the box automatically updated its firmware.
    After that update the box was fully workable and survived a number of reboots and switch-offs.

    More details:
    When I connect power adapter to the box, I can see that a blue LED somewhere inside of the box (on its motherboard, near USB1) is blinking: 1 time for a moment + 8 times a little bit faster (I don't know whether this is a self-test or not); the LED outside is still off.
    When I press Power button - Blue LED outside is ON, and that's it: no HDMI signal, cannot switch-off the box with the button.
    When I try to switch-off the device with Power button - no reaction: the LED outside is still blue.

    All known to me methods to recover the box didn't help:

    1) connect the box to the display, connect power adapter, press power button for 6+ secs: LED is blue, no HDMI signal;
    1.1 [this topic's method]) the same but with connected USB flash drive which contains update.zip (renamed U9H_FW005.zip) + recovery.img (from that zip-file) + factory_update_param.aml: LED on my flash drive didn't blink, so there were no attempts to read USB drive content;
    2) usage of USB_Burning_Tool (provided together with FW008 firmware): run USB_Burning_Tool, connect the box with OTG cable to PC, connect power adapter, press Power button for some [long] time until the box is recognized by the PC - no success: LED is blue, box was not recognized; tried this method on two different PCs with different OSs (Win10 and Win7) - no success;

    So, the box looks completely dead.
    Could you please suggest any other option to unbrick the box?
     
  18. skynet

    skynet Moderator Moderator

    PSU may have issue, can you try with another one ?
     
  19. extrawing

    extrawing New Member

    Thank you for the idea. I've just tested with another PSU - symptoms are same :(
    Basic test of the original one has shown good voltage; output power under loading I cannot test.
     
  20. skynet

    skynet Moderator Moderator

    Last test you can try is to connect it to another display.

    If not working (no recovery menu, nothing with USB tools) then think about a RMA