[Lenovo Yoga Tab 2 Questions & Answers] yoga2 1050l cant mount:
Hey folks

I ve some trouble with the yoga2 1050L of my parents.

How it started?

- from time to time it freezed

- after that a error message "sd broken" or something like that had been shown on the display

- but it worked for a while from that point

- since 2 weeks it doesnt boot anymore

- u can see the "LENOVO by Android", then it restarts --> loop

What did I try till now?

- moving to the recovery mode

- but all options (wipe and co.) ended/will end in the same error-routine (excepted "power off", there will be shown only 2 command lines)

E: failed to mount /cache (invalid argument)
E: Cant mount /cache/recovery/log
E: Can't open /cache/recovery/log
E: failed to mount /cache (invalid argument)
E: Cant mount /cache/recovery/last_log
E: Can't open /cache/recovery/last_log
E: failed to mount /cache (invalid argument)
E: Cant mount /cache/recovery/last_install
E: Can't open /cache/recovery/last_install

and then?

- I googled, found some information (table-fail, emmc-fail and more)

- I tried 2 options

Option 1

- installing the intel usb driver, the intel phoneflashtool light (incl. ?dsx?-usb-mode-driver what ever) and the suggested rom "Lenovo_Yoga_Tablet_2_1050L_USR_S000215_150324"

- followed the guide, the start was good (efilinus, droidboot), then it timed out:

INFO......"Baytrail0366623B" "oem" "wipe" "ESP" command
WARNING......"Baytrail0366623B" "oem" "wipe" "ESP" timed out (220s)
INFO......"Baytrail0366623B" "oem" "wipe" "ESP" command
WARNING......"Baytrail0366623B" "oem" "wipe" "ESP" timed out (220s)
INFO......"Baytrail0366623B" "start partitioning" command
WARNING......"Baytrail0366623B" "start partitioning" timed out (220s)
INFO......"Baytrail0366623B" "start partitioning" command
ERROR......"Baytrail0366623B" "start partitioning" timed out (220s)
ERROR: Flash failed

- on the tablet-display had been shown the following

"EFILINUX ERROR [target_from_inputs:316] Reset Source couldnt be retrieved. Falling back in Target B OOB"

- after I choosed the option in the flash-tool "Force Fastboot Parsing

EFILINUX ERROR [target_from_inputs:316] Reset Source couldnt be retrieved. Falling back in Target B OOB
EFILINUX ERROR [android_image_start_buffer:737] boot image digital signature verification failed :0

- and after that the tablet switched to the recovery mode and showed the error-routine from "what did I try till now"

Cause of "boot image digital signature verification failed:0" I thought/think that I try to flash with the wrong ROM-Version,

Cause my Android System Recovery-window shows me "after using the restore kitkat bios 830-1050-v2-tool" "LRX22C.YT2-1050L_USR_S100346_1604081524_WW52ROW

Option 2

- I downloaded the "restore-kitkat-bios-830-1050-v2"-tool

- and it worked.

- after that I tried to flash the tablet with the known rom

- it seems that it works fine, cause on my tablet will be shown the message

fastboot_thread: FASTBOOT INIT....
FASTBOOT CMD WAITING
CMD "WIPE"
CMD (oem wipe ESP)....
*and after I disconnect it from the laptop after getting the "flash failed"-information and some waiting*
CMD "wipe" COMPLETE.
RESULT: OK
*but I couldnt do anything on my tablet for a while

- but the progressing in the flash tool shows at the end also a "flash failed".

12/22/18 15:41:55.559 INFO : [Port 0/1] Running `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "INT0366623B" "oem" "wipe" "ESP"` command
12/22/18 15:45:35.998 WARNING: [Port 0/1] Command `C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe "-S" "100M" "-s" "INT0366623B" "oem" "wipe" "ESP"` timed out (220 s)
12/22/18 15:45:35.998 INFO : [Port 0/1] Retrying `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "Baytrail0366623B" "oem" "wipe" "ESP"` command
12/22/18 15:49:16.223 WARNING: [Port 0/1] Command `C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe "-S" "100M" "-s" "Baytrail0366623B" "oem" "wipe" "ESP"` timed out (220 s)
12/22/18 15:49:16.223 INFO : [Port 0/1] Running `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "Baytrail0366623B" "oem" "start_partitioning"` command
12/22/18 15:49:21.307 WARNING: [Port 0/1] Command `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "Baytrail0366623B" "oem" "start_partitioning"` failed
12/22/18 15:49:21.307 INFO : [Port 0/1] Retrying `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "Baytrail0366623B" "oem" "start_partitioning"` command
12/22/18 15:49:26.348 ERROR : [Port 0/1] Command `"C:\Program Files (x86)\Intel\Platform Flash Tool Lite\fastboot.exe" "-S" "100M" "-s" "Baytrail0366623B" "oem" "start_partitioning"` failed
12/22/18 15:49:26.348 ERROR : [Port 0/1] Flash failed (Command type: Fastboot)

Whats next?

- I ask for help, hope that someone has some ideas or an answer that shows me that there is nothing what I can do.

- after I disconnected the mini-usb from my tablet (cause the flash tool shows me the message "flash failed") the table shows me the known progressing-lines and

E: write failed: Cannot send after transport endpoint shutdown
n
FASTBOOT OFFLINE!
FASTBOOT CMD WAITING

- I dont get the 2 message from before "

EFILINUX ERROR [target_from_inputs:316] Reset Source couldnt be retrieved. Falling back in Target B OOB
EFILINUX ERROR [android_image_start_buffer:737] boot image digital signature verification failed :0

- and after an other while it shows me the error-routine from above again while i am in the "android system recovery "3e"

Questions

- Does anyone have some ideas/solutions?

- What does the "cant amount/load" mean? Cache fail?

- What does the "boot image digital signature verification failed :0" mean? (branded tablet?, wrong rom?)

- Couldt it be that there is a massive transport delay?

- What can I do next?

- I read something about an option using the sd-card to flash the tablet/firmware? is this an option?

Sincerely and thanks for reading the wall of text.

J