10-17-2019, 03:04 AM | #1 |
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My Kindle PW1 stop working
Hi,
My Kindle PW1 stop working. So I used Putty through ttl to start it. It shows the Id/SN are missing. It can't detect the board. So it struck at using default environment. And it drains battery very quickly. What should I do now? Try to access fast boot or overwrite firmware? Thanks, Last edited by mimicxz; 10-17-2019 at 03:07 AM. |
10-17-2019, 03:11 AM | #2 | |
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10-17-2019, 04:57 AM | #3 | |
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CPU: Freescale i.MX50 family 1.1V at 800 MHz mx50 pll1: 800MHz mx50 pll2: 400MHz mx50 pll3: 216MHz ipg clock : 66666666Hz ipg per clock : 66666666Hz uart clock : 24000000Hz ahb clock : 133333333Hz axi_a clock : 400000000Hz axi_b clock : 200000000Hz weim_clock : 100000000Hz ddr clock : 800000000Hz esdhc1 clock : 80000000Hz esdhc2 clock : 80000000Hz esdhc3 clock : 80000000Hz esdhc4 clock : 80000000Hz MMC: FSL_ESDHC: 0, FSL_ESDHC: 1 Board: Unknown Boot Reason: [POR] Boot Device: MMC Board Id: S/N: Invalid board id! Can't determine system type for RAM init.. bailing! DRAM: 0 kB Using default environment Since Previous posts never solved. any one can tell me where to find working Fast boot img? Thanks, |
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10-17-2019, 09:16 AM | #4 |
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No reply to your posts in two hours?
Maybe you forgot to pay your support contract here. The eMMC has died on the board. There are at least two threads here on the details of how to replace it. Although, unless you have copied down those private, outside of the filesystem, values; you will still be S.O.L. Sell as a used, working, replacement screen and junk the rest. |
10-17-2019, 09:18 AM | #5 | |
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I find my sn on amazon, but what else private data I need? |
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10-17-2019, 05:33 PM | #6 | |
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- Serial number (you have that) - Wi-Fi MAC address - Board ID (referred to as 'mfg') - PCB serial number ('pcbsn') Your options are: - Get these from a working unit. - Hack up U-Boot to make it capable of initializing the board's DRAM without knowing what Kindle model this is (you have to read, modify, and compile the Lab126 U-Boot source code for this to happen). It's theoretically a check that you have to replace with a hardcoded value. - Try random values (especially for Board ID) until something works. - Try a sector-by-sector recovery of the internal eMMC to see if you can recover your board IDs. This data is on a user-inaccessible part of the eMMC. This thread is a good starting point: https://www.mobileread.com/forums/sh...d.php?t=271750 |
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10-17-2019, 08:46 PM | #7 | |
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First:I need to replace eMMC or I just need write back the information to make kindle work? - Serial number (you have that) - Wi-Fi MAC address (I found online the easy way to do it is make a new one from the devices I have with +1) - Board ID (referred to as 'mfg') **Where to find it or make a new one?** - PCB serial number ('pcbsn') (The Sticker on the board?) |
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10-17-2019, 09:01 PM | #8 |
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And where can I found PW1's imgs to download? All the links on forum are dead.
Thanks again. |
10-19-2019, 04:29 AM | #9 | |||
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- PCB serial number ('pcbsn') (The Sticker on the board?) [/quote] If the sticker on the board follows this template: Code:
#XX#X#XX#XX##XXXX### And if it follows this template: Code:
###############X But one question: why don't you patch U-Boot to ignore the serial number check and initialize DRAM as if it was a Paperwhite? As a start, check the file board/imx50_yoshi/imx50_yoshi.c. It's a good start, and from a casual reading of the code, I can see code sections that are very relevant to the issue you're facing. |
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10-19-2019, 04:33 AM | #10 | |
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Use KindleTool by @NiLuJe to unpack this. Note that Amazon updates do not include the diags partition (/dev/mmcblk0p2), so make sure that you have a backup of that (or better yet, of the whole shebang: /dev/mmcblk0) |
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10-29-2019, 06:12 AM | #11 | |
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That's the part I need to find. Does amazon's old version image include diags' iamge? Thanks, |
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