[Android Q&A, Help & Troubleshooting] din_vl:
Hello

I try to recover after error "Boot failed: EFI Hard drive " with this guide:

The recovery of the tablet

Perhaps you once wanted to downgrade from 5.0 to 4.4 - and now the tablet doesn't work, error like Boot failed: EFI Hard drive and tablet load Bios but does not start. A little instruction.

1. Downlaod repair_Bios.rar and unzip it to the root of any drive.

2. Run Phone Flash Tool (version 5.2.4)

3. Browse -> open the file from the archive -> flash.xml

4. Turn off the tablet

5. Hold volume buttons (both) and the power button. The tablet should go into Fastboot Starting...

6. Plug tablet to PC, Phone Flash Tool should detect it (Some issues have been reported when plugging into front USB ports, USE ONLY BACK USB PORTS)

7. Click Flash•Since my tablet is S8-50F, after repair_Bios.rar in droidboot it was determined as S8-50LC. Don't worry, after a full flash everything will fall into place everywhere and will be determined correctly.

•During the firmware repair_Bios.rar long "does nothing". Do not worry, just wait.

8. The firmware should pass successfully, the tablet itself will boot in FASTBOOT MODE.

9. Use Downgrading procedure to get back to stock KK firmware.

10. Read all instructions carefully

11. Flash a manual roll back from LP 5.0 to KK 4.4.

After 8th paragraph do not turn off Tablet, let it stay in Fastboot Mode until you figure out how to downgrade!

after I run start to flash I get this:

02/08/16 15:30:20.031 INFO : Ready to flash!

02/08/16 15:35:30.187 INFO : Port 0/1/2: Flashing OS

02/08/16 15:35:30.187 INFO : Port 0/1/2: fastboot -s BaytrailFA98ECF9 flash osloader "C:/efilinux-user.efi"

02/08/16 15:35:32.296 INFO : Port 0/1/2: fastboot -s BaytrailFA98ECF9 boot "C:/droidboot.img"

02/08/16 15:35:35.049 INFO : Port 0/1/2: sleep 25000 ms

02/08/16 15:36:00.051 INFO : Port 0/1/2: fastboot -s BaytrailFA98ECF9 oem wipe ESP

02/08/16 15:38:00.220 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem wipe ESP"

02/08/16 15:38:02.225 WARNING: Port 0/1/2: Retry to execute fastboot -s BaytrailFA98ECF9 oem wipe ESP

02/08/16 15:40:02.393 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem wipe ESP"

02/08/16 15:40:04.397 WARNING: Port 0/1/2: Failed to execute non mandatory command fastboot -s BaytrailFA98ECF9 oem wipe ESP, ignoring error

02/08/16 15:40:04.397 INFO : Port 0/1/2: fastboot -s BaytrailFA98ECF9 oem wipe reserved

02/08/16 15:42:04.566 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem wipe reserved"

02/08/16 15:42:06.571 WARNING: Port 0/1/2: Retry to execute fastboot -s BaytrailFA98ECF9 oem wipe reserved

02/08/16 15:44:06.739 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem wipe reserved"

02/08/16 15:44:08.742 WARNING: Port 0/1/2: Failed to execute non mandatory command fastboot -s BaytrailFA98ECF9 oem wipe reserved, ignoring error

02/08/16 15:44:08.742 INFO : Port 0/1/2: fastboot -s BaytrailFA98ECF9 oem start_partitioning

02/08/16 15:46:08.910 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem start_partitioning"

02/08/16 15:46:10.914 WARNING: Port 0/1/2: Retry to execute fastboot -s BaytrailFA98ECF9 oem start_partitioning

02/08/16 15:48:11.082 WARNING: Port 0/1/2: Process TIMEOUT Failed to execute ""C:/Program Files (x86)/Intel/Phone Flash Tool/fastboot.exe" -s BaytrailFA98ECF9 oem start_partitioning"

02/08/16 15:48:13.086 ERROR : Port 0/1/2: Flash failure

anyone please help?