[Nexus 7 Q&A, Help & Troubleshooting] apus apus:
Hi,

My Nexus 7 2012 tablet was running very slow with Lollypop 5.1.1, so I tried to downgrade it to Kitkat 4.4.4.

I first installed Clockworkmod 7 and then tried to flash the image. I did it on a Mac Terminal. I had to add ./ in some of the files as I got a fastboot not found error but still kept on showing errors. I finally made the huge mistake of trying to reboot and the tablet hasn´t load from that moment, not even the battery signal. The computer doesn't recognize it either. I have tried several button combinations to start the tablet but nothing works. All I get is a black screen.

Once I got here, could you tell me, is this a hard brick? Is there a solution? Do I have to say goodbye to my tablet? Any help will be very much appreciated.

Thanks in advance.

In case this clears the process, here's what the Terminal showed:

Last login: Sun Jul 3 16:45:48 on ttys000

jurgen:~ admin$ cd /JURGEN/desktop/kitkat

-bash: cd: /JURGEN/desktop/kitkat: No such file or directory

jurgen:~ admin$ cd desktop/kitkat

jurgen:kitkat admin$ ./flash-all.sh

./flash-all.sh: line 17: fastboot: command not found

./flash-all.sh: line 18: fastboot: command not found

./flash-all.sh: line 19: fastboot: command not found

./flash-all.sh: line 20: fastboot: command not found

./flash-all.sh: line 21: fastboot: command not found

./flash-all.sh: line 22: fastboot: command not found

./flash-all.sh: line 23: fastboot: command not found

./flash-all.sh: line 24: fastboot: command not found

./flash-all.sh: line 26: fastboot: command not found

./flash-all.sh: line 27: fastboot: command not found

./flash-all.sh: line 29: fastboot: command not found

jurgen:kitkat admin$ ./flash-all.sh

...

(bootloader) Bootloader is already unlocked

OKAY [ 0.020s]

finished. total time: 0.020s

erasing 'boot'...

OKAY [ 0.143s]

finished. total time: 0.143s

******** Did you mean to fastboot format this partition?

erasing 'cache'...

OKAY [ 0.126s]

finished. total time: 0.126s

erasing 'recovery'...

OKAY [ 0.025s]

finished. total time: 0.025s

******** Did you mean to fastboot format this partition?

erasing 'system'...

OKAY [ 0.627s]

finished. total time: 0.627s

******** Did you mean to fastboot format this partition?

erasing 'userdata'...

OKAY [ 10.666s]

finished. total time: 10.666s

sending 'bootloader' (2100 KB)...

OKAY [ 0.275s]

writing 'bootloader'...

OKAY [ 1.224s]

finished. total time: 1.499s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 25: ./sleep: No such file or directory

ERROR: Unable to create a plug-in (e00002be)

< waiting for device >

sending 'radio' (16384 KB)...

OKAY [ 2.036s]

writing 'radio'...

FAILED (remote: (BadParameter))

finished. total time: 2.059s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 28: ./sleep: No such file or directory

ERROR: Unable to create a plug-in (e00002be)

< waiting for device >

archive does not contain 'boot.sig'

archive does not contain 'recovery.sig'

archive does not contain 'system.sig'

archive does not contain 'tos.img'

Creating filesystem with parameters:

Size: 30080499712

Block size: 4096

Blocks per group: 32768

Inodes per group: 8160

Inode size: 256

Journal blocks: 32768

Label:

Blocks: 7343872

Block groups: 225

Reserved block group size: 1024

Created filesystem with 11/1836000 inodes and 159268/7343872 blocks

Creating filesystem with parameters:

Size: 464519168

Block size: 4096

Blocks per group: 32768

Inodes per group: 7088

Inode size: 256

Journal blocks: 1772

Label:

Blocks: 113408

Block groups: 4

Reserved block group size: 31

Created filesystem with 11/28352 inodes and 3654/113408 blocks

--------------------------------------------

Bootloader Version...: 4.23

Baseband Version.....: N/A

Serial Number........: 015d25648b5c1a14

--------------------------------------------

checking product...

FAILED

Device product is 'grouper'.

Update requires 'tilapia'.

finished. total time: 0.123s

jurgen:kitkat admin$ ./flash-all.sh

...

(bootloader) Bootloader is already unlocked

OKAY [ 0.020s]

finished. total time: 0.020s

erasing 'boot'...

OKAY [ 0.017s]

finished. total time: 0.017s

******** Did you mean to fastboot format this partition?

erasing 'cache'...

OKAY [ 0.083s]

finished. total time: 0.083s

erasing 'recovery'...

OKAY [ 0.017s]

finished. total time: 0.017s

******** Did you mean to fastboot format this partition?

erasing 'system'...

OKAY [ 0.109s]

finished. total time: 0.109s

******** Did you mean to fastboot format this partition?

erasing 'userdata'...

OKAY [ 4.938s]

finished. total time: 4.938s

sending 'bootloader' (2100 KB)...

OKAY [ 0.276s]

writing 'bootloader'...

OKAY [ 1.207s]

finished. total time: 1.483s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 25: ./sleep: No such file or directory

< waiting for device >

sending 'radio' (16384 KB)...

OKAY [ 2.019s]

writing 'radio'...

FAILED (remote: (BadParameter))

finished. total time: 2.034s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 28: ./sleep: No such file or directory

ERROR: Unable to create a plug-in (e00002be)

< waiting for device >

archive does not contain 'boot.sig'

archive does not contain 'recovery.sig'

archive does not contain 'system.sig'

archive does not contain 'tos.img'

Creating filesystem with parameters:

Size: 30080499712

Block size: 4096

Blocks per group: 32768

Inodes per group: 8160

Inode size: 256

Journal blocks: 32768

Label:

Blocks: 7343872

Block groups: 225

Reserved block group size: 1024

Created filesystem with 11/1836000 inodes and 159268/7343872 blocks

Creating filesystem with parameters:

Size: 464519168

Block size: 4096

Blocks per group: 32768

Inodes per group: 7088

Inode size: 256

Journal blocks: 1772

Label:

Blocks: 113408

Block groups: 4

Reserved block group size: 31

Created filesystem with 11/28352 inodes and 3654/113408 blocks

--------------------------------------------

Bootloader Version...: 4.23

Baseband Version.....: N/A

Serial Number........: 015d25648b5c1a14

--------------------------------------------

checking product...

FAILED

Device product is 'grouper'.

Update requires 'tilapia'.

finished. total time: 0.113s

jurgen:kitkat admin$ ./flash-all.sh

...

(bootloader) Bootloader is already unlocked

OKAY [ 0.020s]

finished. total time: 0.020s

erasing 'boot'...

OKAY [ 0.017s]

finished. total time: 0.017s

******** Did you mean to fastboot format this partition?

erasing 'cache'...

OKAY [ 0.083s]

finished. total time: 0.083s

erasing 'recovery'...

OKAY [ 0.017s]

finished. total time: 0.017s

******** Did you mean to fastboot format this partition?

erasing 'system'...

OKAY [ 0.109s]

finished. total time: 0.109s

******** Did you mean to fastboot format this partition?

erasing 'userdata'...

OKAY [ 4.938s]

finished. total time: 4.938s

sending 'bootloader' (2100 KB)...

OKAY [ 0.276s]

writing 'bootloader'...

OKAY [ 1.213s]

finished. total time: 1.489s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 25: ./sleep: No such file or directory

< waiting for device >

sending 'radio' (16384 KB)...

OKAY [ 2.027s]

writing 'radio'...

FAILED (remote: (BadParameter))

finished. total time: 2.045s

rebooting into bootloader...

OKAY [ 0.020s]

finished. total time: 0.020s

./flash-all.sh: line 28: ./sleep: No such file or directory

< waiting for device >

archive does not contain 'boot.sig'

archive does not contain 'recovery.sig'

archive does not contain 'system.sig'

archive does not contain 'tos.img'

Creating filesystem with parameters:

Size: 30080499712

Block size: 4096

Blocks per group: 32768

Inodes per group: 8160

Inode size: 256

Journal blocks: 32768

Label:

Blocks: 7343872

Block groups: 225

Reserved block group size: 1024

Created filesystem with 11/1836000 inodes and 159268/7343872 blocks

Creating filesystem with parameters:

Size: 464519168

Block size: 4096

Blocks per group: 32768

Inodes per group: 7088

Inode size: 256

Journal blocks: 1772

Label:

Blocks: 113408

Block groups: 4

Reserved block group size: 31

Created filesystem with 11/28352 inodes and 3654/113408 blocks

--------------------------------------------

Bootloader Version...: 4.23

Baseband Version.....: N/A

Serial Number........: 015d25648b5c1a14

--------------------------------------------

checking product...

FAILED

Device product is 'grouper'.

Update requires 'tilapia'.

finished. total time: 0.112s

jurgen:kitkat admin$