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Old 09-01-2019, 07:01 PM   #1
Emulatore
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Device: Aura HD Cybook Odyssey
PW2 Help Unbrick

My friend have a PW2 stop on tree, so i used serial to figure out if can be unbricked, when i try to follow the guide for this guide
https://gist.github.com/ramast/58633...on-update-file
to enter fastboot i got follow output:
Code:
In:    serial
Out:   serial
Err:   serial
POST done in 0 ms
Battery voltage: 3993 mV

running cmd: fastboot 
Entering fastboot mode...
USB speed: HIGH
Connected to USB host!
USB speed: HIGH
Connected to USB host!
mmc write failed
Error! Couldn't write NV variables. (-18)

Warning: fail to get ext csd for MMC!
idme_update_var ERROR: couldn't switch back to user partition
and when i try to go in diag mode
Code:
setting 'bootmode' to 'diags'...
setvar:bootmode diags FAILED (remote: update error)
finished. total time: 0.009s
is it mean the mmc is failed? is it going to be a screen to sell ?

thanks for any reply or
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Old 09-04-2019, 05:19 PM   #2
WaseemAlkurdi
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Posts: 147
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Device: Kindle Touch (K5) Wi-Fi x 2, Kindle (7th Gen, KT2), Paperwhite 3rd Gen
Quote:
Originally Posted by Emulatore View Post
My friend have a PW2 stop on tree, so i used serial to figure out if can be unbricked, when i try to follow the guide for this guide
https://gist.github.com/ramast/58633...on-update-file
to enter fastboot i got follow output:
Code:
In:    serial
Out:   serial
Err:   serial
POST done in 0 ms
Battery voltage: 3993 mV

running cmd: fastboot 
Entering fastboot mode...
USB speed: HIGH
Connected to USB host!
USB speed: HIGH
Connected to USB host!
mmc write failed
Error! Couldn't write NV variables. (-18)

Warning: fail to get ext csd for MMC!
idme_update_var ERROR: couldn't switch back to user partition
and when i try to go in diag mode
Code:
setting 'bootmode' to 'diags'...
setvar:bootmode diags FAILED (remote: update error)
finished. total time: 0.009s
is it mean the mmc is failed? is it going to be a screen to sell ?

thanks for any reply or
An eMMC costs under $10 ... you could replace it instead.
(Source for both statements: https://www.mobileread.com/forums/sh...d.php?t=271750)
But replacement requires a hot air station, and beware, it's not trivial. It's better to get the spare part and let a friend with SMD reworking experience do it.
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Old 09-06-2019, 07:01 AM   #3
Emulatore
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Posts: 2
Karma: 10
Join Date: Jan 2018
Device: Aura HD Cybook Odyssey
Quote:
Originally Posted by WaseemAlkurdi View Post
An eMMC costs under $10 ... you could replace it instead.
(Source for both statements: https://www.mobileread.com/forums/sh...d.php?t=271750)
But replacement requires a hot air station, and beware, it's not trivial. It's better to get the spare part and let a friend with SMD reworking experience do it.
Thanks for replace idea, could a simple reflow solve the eMMC problem ?
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Old 09-06-2019, 08:14 AM   #4
WaseemAlkurdi
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Device: Kindle Touch (K5) Wi-Fi x 2, Kindle (7th Gen, KT2), Paperwhite 3rd Gen
Quote:
Originally Posted by Emulatore View Post
Thanks for replace idea, could a simple reflow solve the eMMC problem ?
If it's cracked solder, then yeah, a reflow might fix it, especially if the Kindle suffered a recent drop to a hard floor that might've caused a minuscule crack in the solder.

You can also desolder the eMMC and test it using an ordinary SD card reader. (like this).

But since you are considering this solution, just buy a new eMMC. It's not really expensive. At least, it's better than selling it off.
You can even get one from a Kindle with a cracked screen. But since they are cheap online, it might be even cheaper to simply buy an eMMC.
The part numbers are in the thread I linked to, and you can use the pictures in this blog post:https://ripitapart.com/2018/02/25/em...-emmc-storage/

Edit: Contrary to what's known around here, eMMC replacements don't have to be the same exact make and model ... not even the same ball-out is required.

Last edited by WaseemAlkurdi; 09-06-2019 at 08:20 AM.
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