Bricked KT2 - "Invalid board id"

[Jarmex]

Hi all,

I've managed to make a bit of a mess of my KT2. I managed to install the wrong image when jailbreaking and now the Kindle refuses to boot, and I am not able to connect to it through USB. Cracked it open and attached a serial adapter to receive the following output:

U-Boot 2009.08-lab126 (Aug 07 2014 - 00:52:13)

CPU: Freescale i.MX6 family TO0.0 at 996 MHz
Temperature: 29 C, calibration data 0x58250a5f
mx6sl pll1: 996MHz
mx6sl pll2: 528MHz
mx6sl pll3: 480MHz
mx6sl pll8: 50MHz
ipg clock : 66000000Hz
ipg per clock : 66000000Hz
uart clock : 80000000Hz
cspi clock : 60000000Hz
ahb clock : 132000000Hz
axi clock : 198000000Hz
emi_slow clock: 22000000Hz
ddr clock : 396000000Hz
usdhc1 clock : 198000000Hz
usdhc2 clock : 198000000Hz
usdhc3 clock : 198000000Hz
usdhc4 clock : 198000000Hz
MMC: FSL_ESDHC: 0,FSL_ESDHC: 1,FSL_ESDHC: 2
Board: Unknown
Boot Reason: [ POR ]
Boot Device: NAND
Board Id: <redacted board id>
S/N: <redacted serial number>
I2C: ready
Invalid board id! Can't determine system type for RAM init.. bailing!
DRAM: 0 kB
Using default environment

In: serial
Out: serial
Err: serial
Quick Memory Test 0x80000000, 0xffff0000
POST done in 4 ms

Unfortunately I am not able to do anything at this point - no input into the putty terminal will bring up a console, I've tried hitting enter multiple times on boot, but I guess it hasn't got to the autoboot boot step to be able to cancel it.

I understand fastboot will help me here, however I don't know how I can get to fastboot - I am not able to bring up the uboot console, and I cannot enter USB Debugging mode from the Kindle as it is not recognised by the PC (I hear Window's connect tone, followed immediately by the disconnect).

Is there anything I can do at this point? Any advice definitely welcomed, thank you in advance!

[knc1]

You have a used screen for sale.

Originally Posted by Jail Break, step #1

Positively identify the nickname of your Kindle model from the serial number.
Use four of the first six characters, older Kindles: xxxx xx, newer Kindles: xx xxxx in this table:
Serial Number Nicknames
The factory images **are not** model locked, your care taken with this step is your Kindle's only protection!
If not found in the table, STOP HERE and tell us.

[Jarmex]

Came across this kindle from 5 years ago and figured I'd see if I can resurrect it again.

I don't suppose anything has moved on in the last 5 years that would mean this could be recoverable?

I managed to get the same point I was at before - I can get to uboot through a serial connection, but no amount of hitting keys gets to the uboot > prompt

Thanks in advance

[eddie.t.h]

And does the board_id indicated by the uboot agree with the correct one written on the motherboard?

In any case, you need to put the reader into boot state from usb. Take a look at this thread: https://www.mobileread.com/forums/sh...d.php?t=340387

When you will have working fastboot then upload proper uboot extracted for example from update file. Then it will be easy :-)

[Jarmex]

Originally Posted by eddie.t.h

And does the board_id indicated by the uboot agree with the correct one written on the motherboard?

In any case, you need to put the reader into boot state from usb. Take a look at this thread: https://www.mobileread.com/forums/sh...d.php?t=340387

When you will have working fastboot then upload proper uboot extracted for example from update file. Then it will be easy :-)

Amazing, thank you eddie! That thread was exactly what I needed. Got a working fastboot using it, and from that point on just followed the various posts to restore the rest of it.

Kindle now working again after 5.5 years of being broken, again a massive 'thank you'!

[eddie.t.h]