Quote:
Originally Posted by cipi65
In first place, I want to ask what Kindle model is this ? I did't find DP75SDI in any list.
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It's somewhat confusing to judge by the model number on the back as both PW2 and PW3 models are DP75SDI, but the PCBID prefix corresponds with this boardid within the u-boot sources:
Code:
#define BOARD_ID_PINOT_2GB "02F"
This identifies it as a PW2 with 3G.
Quote:
Originally Posted by cipi65
Problem is ( I think ) with the firmware because when I turn on, the backlight lit and kindle startup page blinks time to time.
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The device sounds like it's bootlooping - IIRC U-Boot and Linux both have almost identical splash screens and the blinking probably indicates a transition between the 2.
Quote:
Originally Posted by cipi65
I have usb to serial interface ( TIAO USB ) but I did't find any firmware for this model.
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You can grab the firmware you need from here:
https://www.amazon.com/update_Kindle_Paperwhite_6th_Gen.
I'm not sure if your usb-serial interface is suitable for this - if not, basic CH340, CP2102 and FT232RL based boards are available for relatively cheap on most online marketplaces.
As for actually fixing this, I'd reinstall the firmware from scratch. Assuming there's no issues with the eMMC storage, you
should be able to enter the recovery menu by pressing [Enter] at the prompt after the kernel boots. You'll get a menu similar to this:
Code:
Menu
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3. Load MMC over USB storage
E. Export FAT partition
U. Update using update*.bin file on FAT partition
D. dmesg / kernel printk ring buffer.
Q. quit
Export the FAT partition, load the firmware image to the Kindle then exit the menu and either select the
Update using update*.bin file on FAT partition option or reboot the device. Both of these will begin installation of the update.
I'm curious about that switch on the RESET pad - was this fitted when you received the device and is it functional when you press it? I've never seen that pad populated before
