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#46 |
Linux User
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Karma: 6123806
Join Date: Sep 2010
Location: Heidelberg, Germany
Device: none
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An approximation of where to expect glue. If you have to open it, I think it's best to start from the top left or top right corner, and not from the bottom since there's more glue and more sensitive bits down there (LED, light layer). Maybe warming it up a little would also help to soften the glue, I don't know. It was rather cold when I tried it and it did not come off easily.
As for the exact position of the SD card... the top left corner of the SD card is 18mm from the top and 28mm from the left, so it's pretty much aligned to the power button, which is 11mm-28mm from the left, so the SD card starts where the power button ends. And the SD card ends where the Kobo logo starts (on the X axis). It does not actually reach into the Kobo logo as the illustration makes it appear, the scale is quite inaccurate, sorry... |
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#47 | |
Enthusiast
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Karma: 13854
Join Date: Oct 2014
Device: Kobo Aura H20, Nook Simple Touch with Glowlight
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#48 | |
Nameless Being
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(Does anyone have suggestions on producing a cleaner scan? When looking at the full resolution image, it looks like the board was vibrating. Or is it just a product of the quality of the scanner, since my old scanner definitely produced better results.) |
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#49 |
Linux User
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Join Date: Sep 2010
Location: Heidelberg, Germany
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You'd need a CCD scanner; nowadays CIS is more common (particularly with all-in-one printers) but it lacks any kind of depth perception so you get blurry results when scanning objects such as this.
If you can get an old Epson 1260 (or whatever) from Ebay, around $10 if you are lucky... that's what I used to make scans of the iriver Story HD which turned out fine, if a bit too dark... but I don't have that device anymore so... |
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#50 |
Nameless Being
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Now that I know what to look for, that is definitely the cause. Thank-you.
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#51 | |
Resident Curmudgeon
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Join Date: Nov 2006
Location: Roslindale, Massachusetts
Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3
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#52 |
Grand Sorcerer
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Karma: 47303822
Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
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#53 |
Linux User
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Location: Heidelberg, Germany
Device: none
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Recovering brick _without_ full SD image for the H2O:
Assuming only the system/data partition is bricked, but u-boot and recovery partition still intact, you should be able to force a factory reset, by extracting /etc/u-boot/mx50-ntx/u-boot.recovery out of the firmware update KoboRoot.tgz and putting it on the card in the right place. Code:
dd if=kobo-update-3.12.0.tgz/etc/u-boot/mx50-ntx/u-boot.recovery of=/dev/sdcard bs=128k count=1 seek=6 Last edited by frostschutz; 12-14-2014 at 07:35 PM. |
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#54 |
Grand Sorcerer
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Karma: 47303822
Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
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If the recovery partition is still intact, would it be better to use the u-boot.recovery file that is on the recovery partition? That has the advantage that it should mean it matches the rest of the files used in the recovery and means you don't need to download the firmware package before trying this.
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#55 | |
Nameless Being
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A scanner is definitely a better tool for the job, assuming, of course, I still had a good scanner on hand. |
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#56 | |
Nameless Being
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I ended up mounting the recovery file system on a Linux box then following the recovery script manually (it involves formatting the system and user partitions, then decompressing a file to each file system). That seemed to be a lot safer than messing around with the bootloader. |
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#57 | ||
Grand Sorcerer
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Karma: 47303822
Join Date: Jul 2011
Location: Sydney, Australia
Device: Kobo:Touch,Glo, AuraH2O, GloHD,AuraONE, ClaraHD, Libra H2O; tolinoepos
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#58 | |
Wizard
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Karma: 2914715
Join Date: Jun 2012
Device: kobo touch
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#59 |
Linux User
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Join Date: Sep 2010
Location: Heidelberg, Germany
Device: none
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If the brick is just a matter of a damaged file somewhere on the system partition, you could try to extract the entire firmware update tgz to it and see if that fixes it; if it does, no need to format after all.
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#60 | |
Nameless Being
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Writing up instructions is on my to-do list. There are simply too many requests for firmware images to ignore the recovery issue. |
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Tags |
flash, h2o, image, sdcard, sdcard-image |
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