Need help to unbrick Boox Max Lumi 1

[kekesed97]

Hi, I got this bricked device from a friend, so I don't have any idea on what he previously done.

This device always go into recovery. And the recovery says "Can't load Android system. Your data maybe corrupt. If you continue to get this message, you may need to perform a factory data reset and erase all user data stored in this device."

I search the internet but got little to no info about unbricking a Boox Max Lumi.

Thanks in advance.

[Renate]

Does it give you an option for "factory reset"?

[kekesed97]

It does, and wiped succesfully. It booted, got the backlit up, then the power dropped (I got into Android's first boot loading screen once before the power drops).
I noticed that power-off charging percentage went haywire (from 54% instantly jumped to 100%). I suspect it was power issue?

[kekesed97]

Never mind, I got them working.
Turns out it really have a flat battery. Desoldered the original one and put a test battery I have, and it booted.
However I do want to know the unbricking method, just in case

[kekesed97]

Bumping this thread. I have another question but I don't think it should be posted on a new thread, so I'm posting them here.
My Max Lumi identifies itself as EPSLite2C09, refusing official firmware update. Does anybody have info on this?

[Renate]

Where exactly do you see "EPSLite2C09"?
That could just be some wacky Windows driver that got loaded.

It could be that someone flashed some incompatible firmware.

[kekesed97]

I saw them everywhere. About device, MTP name, ro.product.device...
ro.product.device: EPSLite2C09
ro.build.date: Wed Mar 31 10:46:56 CST 2021
ro.product.model: EPSLite2C09
ro.build.fingerprint: ONYX/EPSLite2C09/EPSLite2C09:10/2021-03-31_10-46_crea-3.1_09ca0952a/1908:user/dev-keys
ro.build.display.id: 2021-03-31_10-46_crea-3.1_09ca0952a
ro.build.version.incremental: 1908

I talked to Boox's customer support and they offered to flash retail firmware for a fee, but I figured the cost outweight the benefit for an out of support device.

[Renate]

So, get the latest update:

Model:  MaxLumi (English)
Finger: ONYX/MaxLumi/MaxLumi:10/2023-12-12_20-35_3.5_4687b1901/12698:user/dev-keys
Link:   http://firmware-us.boox.com/382647ca3866d28d1c3a519c8f1d62e6/update.upx
Size:   1,722,401,345
MD5:    382647ca3866d28d1c3a519c8f1d62e6

Decrypt it
Unpack META-INF/com/google/android/updater-script
In a text editor (NOT Windows Notepad) delete the first two lines (less_than & getprop)
Repack
Use the update

If it gives you any backtalk we can do update-binary directly.