Vankyo S8 (Unisoc SC7731E) stuck in eternal boot after attempting to boot bad TWRP

ak142
Enthusiastic Member

8

10-07-2024, 01:10 PM

#1

Hi,

(I'm reposting this here as a new thread following your advice)

I've got my Vankyo S8 tablet stuck in a state where it tries to boot into Android, but takes forever (even leaving it lying on my desk for 8 hours showed no progress). All the time it shows an animated Vankyo logo, just like it would for a normal boot. It is completely unresponsive to PowerOn+VolumeUp and PowerOn+VolumeDown, no matter whether USB cable is connected or unconnected.

This has happened right after (successfully) unlocking it, and attempting to boot it into a TWRP recovery which may not be matching this device (using fastboot boot recovery).

Original post with all the details:

https://www.hovatek.com/forum/thread-322...#pid243270

What has been attempted since then:
- running down the battery, and holding down Volume Up (or Volume down) while reconnecting it to a charger => nope, shows battery charging animation. Pressing power button in that state (even together with Volume Up (or Volume down) gets it back into eternal boot

- doing adb devices => no, shows nothing. However lsusb shows the following:
Bus 001 Device 070: ID 1782:4001 Spreadtrum Communications Inc. Spreadtrum Phone
KDE's systray proposes to mount it as a storage device, however when I click on it, nothing happens

ak142
Enthusiastic Member

8

10-07-2024, 01:13 PM

#2

Device doesn't look like it's easily openable (to find UART contact points, or similar)

Any ideas?
Thanks,

Alain

ak142
Enthusiastic Member

8

12-07-2024, 07:57 AM

#3

Correction: Eventually, I did manage to open up the device, and it does have contact points, marked VIB+, and SPK- (twice...)

http://alain.knaff.lu/VankyoS8/P1146732.JPG

maxpayne
Intern

4,101

16-07-2024, 08:39 PM

#4

(10-07-2024, 01:10 PM)ak142 KDE's systray proposes to mount it as a storage device, however when I click on it, nothing happens

Does the tablet have a reset pin hole just below the power button? If it does, insert a PIN and hold down for 15 seconds then release

This post was last modified: 16-07-2024, 08:41 PM by maxpayne.

Note!
We have a reply schedule for Free Support. Please upgrade to Private Support if you can't wait.

ak142
Enthusiastic Member

8

17-07-2024, 11:15 PM

#5

(16-07-2024, 08:39 PM)maxpayne
(10-07-2024, 01:10 PM)ak142 KDE's systray proposes to mount it as a storage device, however when I click on it, nothing happens

Does the tablet have a reset pin hole just below the power button? If it does, insert a PIN and hold down for 15 seconds then release

Thanks for your reply.
It does indeed have a reset pin hole.
However, inserting a pin in there for 15 seconds does the same thing as holding power for a long time: it goes into eternal boot.
Even inserting pin, and pressing volume up or down at the same time doesn't do anything else :-(

maxpayne
Intern

4,101

20-07-2024, 05:54 PM

#6

(17-07-2024, 11:15 PM)ak142 Thanks for your reply.
It does indeed have a reset pin hole.
However, inserting a pin in there for 15 seconds does the same thing as holding power for a long time: it goes into eternal boot.
Even inserting pin, and pressing volume up or down at the same time doesn't do anything else :-(

Sound pretty much like you'll need the firmware...strange as it seems.

Note!
We have a reply schedule for Free Support. Please upgrade to Private Support if you can't wait.

ak142
Enthusiastic Member

8

28-07-2024, 10:04 AM

#7

(20-07-2024, 05:54 PM)maxpayne Sound pretty much like you'll need the firmware...strange as it seems.

Thanks for your reply. Unfortunately, Vankyo never published a firmware upgrade for this device, so I'm not sure where to get such firmware.
And even if I had a stock firmware image, the problem would remain how to flash it back on the device, as it seems unreactive to any way to enter a mode capable of flashing.

maxpayne
Intern

4,101

30-07-2024, 10:41 PM

#8

(28-07-2024, 10:04 AM)ak142 Thanks for your reply. Unfortunately, Vankyo never published a firmware upgrade for this device, so I'm not sure where to get such firmware.
And even if I had a stock firmware image, the problem would remain how to flash it back on the device, as it seems unreactive to any way to enter a mode capable of flashing.

It's very much flashable if the firmware is a pac file

Note!
We have a reply schedule for Free Support. Please upgrade to Private Support if you can't wait.

View a Printable Version

Users browsing this thread:
1 Guest(s)

Find us

Call us

Mail us

Useful Links

Actions