[General Topics] MENTD:
Actually, I had looked at that earlier. (The part in the thread where the user talks about the SD card.)

I made sure there was no SD card in mine when I did this, the results I'm posting were with no SD card in.

Also, I am using the ADB version that is posted on page one with the rest of the utilities. (Just want to clarify.)

H:\RCT6873W42\adb-setup-1.4.3\adb>adb.exe version

Android Debug Bridge version 1.0.32

Revision eac51f2bb6a8-android

I tried again with a little different result. What I did was, I pressed the VOL UP button

even though the screen on the tablet is blank and I got results in the CLI interface on PC:

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot flashing unlock

...

(bootloader) Please confirm the device state action using the UI.

(bootloader) got key event 2

(bootloader) EV_UP received

(bootloader) got key event 2

(bootloader) EV_UP received

(bootloader) got key event 4

(bootloader) EV_POWER received

FAILED (remote: couldn't change state!)

finished. total time: 5.092s

- It recieved the VOL UP (as you can see, I pressed it twice and it received it twice) but it still didn't

unlock the bootloader. I was able to do "fastboot reboot" and the tablet rebooted but did not have

a countdown or warning, it just rebooted and came up as normal.

Nevertheless, I rebooted again and tried to flash just for ****s and giggles but as expected,

it didn't work. Here are those results:

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe flash boot \RCT6873W42\rca-boot_p

ermissive-20170316-1706.img

(bootloader) boot partition type: raw

target reported max download size of 1001390080 bytes

sending 'boot' (9972 KB)...

(bootloader) Ready to receive: 0x009bd000 size of data

OKAY [ 0.234s]

writing 'boot'...

(bootloader) Device is locked, cannot perform flash in fastboot

(bootloader) Please use the below command to unlock first:

(bootloader) > fastboot flashing unlock

FAILED (remote failure)

finished. total time: 0.263s

Basically I am stuck at unlocking the bootloader. I'm pretty sure that if we can get it unlocked,

the flash will go down without a hitch. When it reboots from adb fastboot reboot command,

the tablet is just a black screen. I can press vol up and see the results (as shown above) on

the CLI in windows but it does not unlock bootloader, unless there is something stupid I'm missing?

P.S. - One cute thing it SAYS is the device can be unlocked hehehe, like rubbing it in my face!

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe flashing get_unlock_ability

...

(bootloader) The device can be unlocked.

OKAY [ 0.000s]

finished. total time: 0.000s

P.S. WOW!!! POSSIBLE BREAKTHRU!

I kept playing with the fastboot unlock command and basically held the volume up button

down while hitting enter to execute the command and... THIS HAPPENED!

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe flashing unlock

...

(bootloader) Please confirm the device state action using the UI.

(bootloader) got key event 2

(bootloader) EV_UP received

(bootloader) got key event 4

(bootloader) EV_POWER received

(bootloader) Userdata erase required, this can take a while...

(bootloader) Ram clear required, this can take a while...

OKAY [ 40.245s]

finished. total time: 40.245s

So I tried to flash:

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe flash boot \RCT6873W42\rca-boot_p

ermissive-20170316-1706.img

(bootloader) boot partition type: raw

target reported max download size of 1001390080 bytes

sending 'boot' (9972 KB)...

(bootloader) Ready to receive: 0x009bd000 size of data

OKAY [ 0.234s]

writing 'boot'...

(bootloader) Flashing partition: boot

OKAY [ 0.219s]

finished. total time: 0.453s

It went VERY FAST! So I did the rest:

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe format userdata

(bootloader) userdata partition type: ext4

(bootloader) userdata partition type: ext4

(bootloader) userdata partition size: 0x00000002a9b00000

Creating filesystem with parameters:

Size: 11436818432

Block size: 4096

Blocks per group: 32768

Inodes per group: 8128

Inode size: 256

Journal blocks: 32768

Label:

Blocks: 2792192

Block groups: 86

Reserved block group size: 687

Created filesystem with 11/699008 inodes and 83521/2792192 blocks

target reported max download size of 1001390080 bytes

erasing 'userdata'...

(bootloader) Erasing partition: userdata

OKAY [ 0.062s]

sending 'userdata' (136634 KB)...

(bootloader) Ready to receive: 0x0856e9e8 size of data

OKAY [ 6.954s]

writing 'userdata'...

(bootloader) Flashing partition: userdata

OKAY [ 0.016s]

finished. total time: 7.032s

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot.exe format cache

(bootloader) cache partition type: ext4

(bootloader) cache partition type: ext4

(bootloader) cache partition size: 0x000000001a900000

Creating filesystem with parameters:

Size: 445644800

Block size: 4096

Blocks per group: 32768

Inodes per group: 6800

Inode size: 256

Journal blocks: 1700

Label:

Blocks: 108800

Block groups: 4

Reserved block group size: 31

Created filesystem with 11/27200 inodes and 3510/108800 blocks

target reported max download size of 1001390080 bytes

erasing 'cache'...

(bootloader) Erasing partition: cache

OKAY [ 0.087s]

sending 'cache' (8692 KB)...

(bootloader) Ready to receive: 0x0087d130 size of data

OKAY [ 0.407s]

writing 'cache'...

(bootloader) Flashing partition: cache

OKAY [ 0.016s]

finished. total time: 0.510s

H:\RCT6873W42\adb-setup-1.4.3\adb>fastboot reboot

rebooting...

finished. total time: 0.000s

- Okay I just realized I followed the original instructions, not yours! 8(

I'm at a black screen now no matter what I do. However, ADB is working.

I'm unable to get adb to reboot though, I figured if I could reboot to fastboot I could

boot to the recovery using your instructions but this is what I get: (kill server doesn't help either)

H:\RCT6873W42\adb-setup-1.4.3\adb>adb reboot fastboot

error: device unauthorized.

This adbd's $ADB_VENDOR_KEYS is not set; try 'adb kill-server' if that seems wro

ng.

Otherwise check for a confirmation dialog on your device.

Gonna mess with it a bit, will report back. Hope I didn't brick my device.