[Miscellaneous Android Development] QuazIqbal:
Thank you sir for the quick support, it means a lot for me

blank fastboot is now accesible by following your instruction, but no fastboot commands get executed , it shows "FAILED (remote: unknown command)"

intel flash tool starts flashing but hangs at 23% and fastboot breaks up , tab tries to boot but then gets again into bios setup ....

Is there a way around to enter droidboot screen? or any other instructions for successful flash....

---------- Post added at 08:46 PM ---------- Previous post was at 08:37 PM ----------

my device is yoga tablet 2 8 inch 830LC model, I have both the firmware file and intel flashtool too, but the thing is that after 23% flash tool freezes and tries to boot up in to intel bios setup, i manually tried to flash system,boot & recovery files in fastboot mode but it breaks saying "FAILED (remote: unknown command)", tried to start tethered twrp also, but no success so far....

---------- Post added at 09:22 PM ---------- Previous post was at 08:46 PM ----------

this is the flash tool log,

07/31/15 02:41:50.672 INFO : Phone Flash Tool V 4.4.4-1 Win32 External (build on Mon Apr 28 09:56:35 UTC 2014)

07/31/15 02:41:50.672 INFO : Using xFSTK version: 1.5.3

07/31/15 02:41:50.780 INFO : Using Android Debug Bridge version 1.0.31

07/31/15 02:41:50.780 INFO : OS version detected: Windows 7 (x64)

07/31/15 02:41:51.014 INFO : Adb and fastboot binaries OK

07/31/15 02:41:51.018 INFO : Phone Flash Tool initialized successfully

07/31/15 02:41:51.031 INFO : Loading Flash file ...

07/31/15 02:41:51.032 INFO : Ready to flash!

07/31/15 02:42:31.109 INFO : Loading Flash file (C:/Users/abcd/Desktop/LENOVO TAB BACKUP FIRMWARE/Stock Firmware/target_bin/flash-LtoKK-PVT-810.xml)

07/31/15 02:42:31.113 INFO : GP_Flag is set to 0x80000045

07/31/15 02:42:31.116 INFO : Ready to flash!

07/31/15 02:43:24.269 INFO : Port 0/4: Rebooting Baytrail3CEDEA9B in Provisonning OS (current state = DNX_STATUS)

07/31/15 02:43:24.269 INFO : Port 0/4: Cannot Reboot android device, status is DNX_STATUS

07/31/15 02:45:28.971 INFO : Port 0/4: Flash stopped

07/31/15 02:45:34.736 INFO : Loading Flash file (C:/Users/abcd/Desktop/LENOVO TAB BACKUP FIRMWARE/Stock Firmware/target_bin/flash.xml)

07/31/15 02:45:34.741 INFO : GP_Flag is set to 0x80000045

07/31/15 02:45:34.747 INFO : Ready to flash!

07/31/15 02:45:38.050 INFO : Port 0/4: Flashing OS

07/31/15 02:45:38.051 INFO : Port 0/4: fastboot -s Baytrail3CEDEA9B flash osloader "C:/Users/abcd/Desktop/LENOVO TAB BACKUP FIRMWARE/Stock Firmware/target_bin/efilinux.efi"

07/31/15 02:45:40.417 INFO : Port 0/4: fastboot -s Baytrail3CEDEA9B boot "C:/Users/abcd/Desktop/LENOVO TAB BACKUP FIRMWARE/Stock Firmware/target_bin/droidboot.img"

07/31/15 02:45:43.293 INFO : Port 0/4: sleep 25000 ms

07/31/15 02:46:08.294 INFO : Port 0/4: fastboot -s Baytrail3CEDEA9B oem wipe ESP

It was stuck here for so long.... then i manually switched off and then again entered fastboot mode, folllowing are yhe further logs....

07/31/15 02:47:18.583 WARNING: Port 0/4: Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s Baytrail3CEDEA9B oem wipe ESP":

< waiting for device >

...

FAILED (remote: unknown command)

finished. total time: 0.003s

07/31/15 02:47:20.583 WARNING: Port 0/4: Retry to execute fastboot -s Baytrail3CEDEA9B oem wipe ESP

07/31/15 02:47:20.694 WARNING: Port 0/4: Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s Baytrail3CEDEA9B oem wipe ESP":

...

FAILED (remote: unknown command)

finished. total time: 0.002s

07/31/15 02:47:22.694 WARNING: Port 0/4: Failed to execute non mandatory command fastboot -s Baytrail3CEDEA9B oem wipe ESP, ignoring error

07/31/15 02:47:22.694 INFO : Port 0/4: fastboot -s Baytrail3CEDEA9B oem start_partitioning

07/31/15 02:47:22.820 WARNING: Port 0/4: Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s Baytrail3CEDEA9B oem start_partitioning":

...

FAILED (remote: unknown command)

finished. total time: 0.003s

07/31/15 02:47:24.820 WARNING: Port 0/4: Retry to execute fastboot -s Baytrail3CEDEA9B oem start_partitioning

07/31/15 02:47:24.993 WARNING: Port 0/4: Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s Baytrail3CEDEA9B oem start_partitioning":

...

FAILED (remote: unknown command)

finished. total time: 0.003s

07/31/15 02:47:26.993 ERROR : Port 0/4: Flash failure