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Cex · 06-29-2016, 04:42 AM

Hi all,

I have a KV (Wifi only) that got bricked during an update (boy and tree on screen).
I've been reading the forums for a while, and I asume that the eMMC may had been destroyed due to low battery during update.

The Kindle boots directly into USB download mode (SE blank MAGREZ HID device on connection to a PC).
I connected a 1.8V converter to the serial console, but I do not get any output (I also checked with an oscilloscope, but no output on TX pin, it even looks like there is not 1.8V in that pin, which should be as it idles at high level).

Assuming the eMMC is completely black, or UBOOT damaged (no UBOOT), or damaged...there should be any output on the console port? Is UBOOT initializing the serial port? I've been checking some logs from other users and it looks like first message ouput is the UBOOT version.

Could someone provide an UBOOT image for the Voyage suitable to be used with MfgTool? I have seen a lot of images for KT, but I'm not sure about the SoC I/O connections being the same and if I could damage the HW by loading an UBOOT image from another model.

My goal is checking if the eMMC is ok or not, and trying to read the IDMEs (I only have the S/N B0130907xxxxxxxx, but have no backup of other idme parameters).

If the eMMC IC is dead I could consider replacing it as I have access to a BGA rework station.

Thanks in advance.

06-29-2016, 04:42 AM	#1
Cex Enthusiast Posts: 29 Karma: 13132 Join Date: Jul 2015 Location: Spain Device: Glo; Glo HD; PW2; Voyage	KV serial console Hi all, I have a KV (Wifi only) that got bricked during an update (boy and tree on screen). I've been reading the forums for a while, and I asume that the eMMC may had been destroyed due to low battery during update. The Kindle boots directly into USB download mode (SE blank MAGREZ HID device on connection to a PC). I connected a 1.8V converter to the serial console, but I do not get any output (I also checked with an oscilloscope, but no output on TX pin, it even looks like there is not 1.8V in that pin, which should be as it idles at high level). Assuming the eMMC is completely black, or UBOOT damaged (no UBOOT), or damaged...there should be any output on the console port? Is UBOOT initializing the serial port? I've been checking some logs from other users and it looks like first message ouput is the UBOOT version. Could someone provide an UBOOT image for the Voyage suitable to be used with MfgTool? I have seen a lot of images for KT, but I'm not sure about the SoC I/O connections being the same and if I could damage the HW by loading an UBOOT image from another model. My goal is checking if the eMMC is ok or not, and trying to read the IDMEs (I only have the S/N B0130907xxxxxxxx, but have no backup of other idme parameters). If the eMMC IC is dead I could consider replacing it as I have access to a BGA rework station. Thanks in advance.