Register Guidelines E-Books Search Today's Posts Mark Forums Read

Go Back   MobileRead Forums > E-Book Readers > PocketBook

Notices

Reply
 
Thread Tools Search this Thread
Old 09-23-2021, 10:47 AM   #16
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
I'd been hoping for something obvious, but I have opened up the Pocketbook, unscrewed the board to reach the front buttons and verified that all buttons work. I tried holding down the power button and various combinations of the direction buttons, with and without plugging in to power.

What if the battery is dead/has been dead since day 1? I'd like to disconnect it from the board and check the voltage, but that will have to wait a while until I gather supplies.
DoomsdayDog is offline   Reply With Quote
Old 09-23-2021, 10:54 AM   #17
nhedgehog
Guru
nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.
 
Posts: 605
Karma: 386782
Join Date: Sep 2013
Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...
Have you tried to power up with the unscrewed mainboard?
nhedgehog is offline   Reply With Quote
Old 09-23-2021, 11:55 AM   #18
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Yes, I tried:
1) press the power button
2) hold the power button for 10+ seconds
3) plug in to power via USB port and press power button
4) plug in to power via USB and hold power button for 10+ seconds

EDIT: and also pressed the left and right buttons together for 10+ seconds as one would for firmware update, plus pressed the direction pad buttons individually
DoomsdayDog is offline   Reply With Quote
Old 09-24-2021, 02:15 AM   #19
nhedgehog
Guru
nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.
 
Posts: 605
Karma: 386782
Join Date: Sep 2013
Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...
Out of ideas. Just to be sure: during your attemps with the buttons the internal SD was present again?
nhedgehog is offline   Reply With Quote
Old 09-24-2021, 07:30 AM   #20
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Quote:
Originally Posted by nhedgehog View Post
Out of ideas. Just to be sure: during your attemps with the buttons the internal SD was present again?
Yes, I put the original SD with the original image back inside.

I'll try fiddling with the connection to the battery, there's nothing to lose I guess.

nhedgehog, thank you so much for your time so far. It's not really a problem if I can't fix this Pocketbook. I've always suspected I was given the broken e-reader on purpose, because I won the two Pocketbooks as a prize in school, and I guess it would have been nasty for the organisers to give the broken device to a kid who didn't also win a second, functional device.
DoomsdayDog is offline   Reply With Quote
Old 09-24-2021, 08:31 AM   #21
nhedgehog
Guru
nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.
 
Posts: 605
Karma: 386782
Join Date: Sep 2013
Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...
Still think it is a button problem or the soldering of the internal SD holder has lost contact. The second can be tested by booting the device up with a little pressure on the internal SD holder (not the SD itself).

Edit: I uploaded some images to illustrate. As you can see battery connector is clipped directly from above. To losen it you have to fixate the socket and carefully pry it loose starting on the cable side. Make sure to use isulated material to avoid shortcuts which can result in battery explosion.
See here too:
https://4pda.to/forum/index.php?show...ost&p=46218407

Edit2: The Russians replaced the screen without disconnecting the battery, this could be an options too to have a closer look at the buttons.

Edit3: More pics: https://4pda.to/forum/index.php?s=&s...ost&p=79397345
Attached Thumbnails
Click image for larger version

Name:	1.jpg
Views:	33
Size:	280.4 KB
ID:	189380   Click image for larger version

Name:	2.jpg
Views:	34
Size:	214.4 KB
ID:	189381  

Last edited by nhedgehog; 09-24-2021 at 09:03 AM.
nhedgehog is offline   Reply With Quote
Old 09-24-2021, 12:43 PM   #22
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Quote:
Originally Posted by nhedgehog View Post
Still think it is a button problem or the soldering of the internal SD holder has lost contact. The second can be tested by booting the device up with a little pressure on the internal SD holder (not the SD itself).
I just tried booting up the good Pocketbook without an internal SD, it exhibits the same behaviour as the broken one, even the output on my computer is the same (Allwinner Technology sunxi SoC OTG connector in FEL/flashing mode). Will fiddle with the SD some more.

Edit: Good device also refuses to boot if I remove the internal SD and place it in the slot for external SD.

Last edited by DoomsdayDog; 09-24-2021 at 12:52 PM.
DoomsdayDog is offline   Reply With Quote
Old 09-24-2021, 01:30 PM   #23
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
I have made a little circuit consisting of a LED and a resistor in series. On the good device, I am able to power the LED by touching wires to the (B+) and (B-) contacts on the board right below where the battery connects. On the broken device nothing happens.
DoomsdayDog is offline   Reply With Quote
Old 09-25-2021, 01:46 PM   #24
nhedgehog
Guru
nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.
 
Posts: 605
Karma: 386782
Join Date: Sep 2013
Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...
Faulty device:
1) LED tester lights up while connected to charger?
2) Have you tested if device boots up while connected to charger?
3) Have you tested if device boots up while connected to charger and slight pressure is put on the contacts of internal SD holder?
nhedgehog is offline   Reply With Quote
Old 09-26-2021, 11:35 AM   #25
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Quote:
Originally Posted by nhedgehog View Post
Faulty device:
1) LED tester lights up while connected to charger?
Yes!
Edit: I would not be surprised if the battery is damaged due to deep discharge after 7 years with only 2-3 attempts to charge/power up the device.

Quote:
Originally Posted by nhedgehog View Post
2) Have you tested if device boots up while connected to charger?
Tested; it doesn't boot up if I press or hold power button.

Quote:
Originally Posted by nhedgehog View Post
3) Have you tested if device boots up while connected to charger and slight pressure is put on the contacts of internal SD holder?
No luck. I tried pressing down on the frame holding the SD card, and also pinching the left and right edges inward.

Last edited by DoomsdayDog; 09-26-2021 at 11:45 AM.
DoomsdayDog is offline   Reply With Quote
Old 09-26-2021, 03:14 PM   #26
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
More evidence that the faulty device is acting as if the internal SD card is not detected, I think: plugging the two devices to power (the good one with internal SD removed) produces the same sequence of noises coming from the A13 chip on both the good and the faulty e-reader (very subtle noises though, require a very quiet room to hear). The noises are very different and much louder when SD card is present on the good device.
DoomsdayDog is offline   Reply With Quote
Old 09-27-2021, 02:52 AM   #27
nhedgehog
Guru
nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.nhedgehog ought to be getting tired of karma fortunes by now.
 
Posts: 605
Karma: 386782
Join Date: Sep 2013
Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...
Can you check all the buttons with a tester (contact if pressed)?
nhedgehog is offline   Reply With Quote
Old 09-28-2021, 06:37 AM   #28
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Quote:
Originally Posted by nhedgehog View Post
Can you check all the buttons with a tester (contact if pressed)?
I'm not sure how to do that. Could you link an example? [Explain like I'm five. Preferably with images...]
DoomsdayDog is offline   Reply With Quote
Old 09-28-2021, 08:28 AM   #29
kib
Junior Member
kib began at the beginning.
 
Posts: 2
Karma: 10
Join Date: Sep 2021
Device: PB631
Hello, I have the exactly same problem with another Pocketbook reader (PB631 Touch HD).
The display is frozen, after powering on the LEDs next to the button blinks shortly and that's all.
It must be a HW problem, not SW as I even received a testing image from Pocketbook that should just show SN of the device after booting, but it does not boot.
Also, there are no signals on the UART port.

I checked that all buttons work correctly with the multimeter.
kib is offline   Reply With Quote
Old 09-28-2021, 02:22 PM   #30
DoomsdayDog
Enthusiast
DoomsdayDog began at the beginning.
 
Posts: 26
Karma: 10
Join Date: Jul 2018
Device: PocketBook Basic 2
Hi kib, welcome to the party! The difference in my case is that the LED by the power button never blinks.

I was also curious to try UART next, how did you connect to the port?

P.S. could you describe how you checked the buttons, if you don't mind helping a noob?

Last edited by DoomsdayDog; 09-28-2021 at 02:30 PM.
DoomsdayDog is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Dark Mode on Jailbreak Kindle 10th basic MMente81 Kindle Developer's Corner 3 09-12-2021 05:03 PM
K5 Jailbreak to night mode on Basic Kindle 5 serthundery Kindle Developer's Corner 2 04-17-2020 06:03 PM
Troubleshooting Exit demo mode - Screwed up serial flashing thtanaka Amazon Kindle 1 05-25-2018 05:16 AM
pdf reflow mode on Pocketbook 614W Basic 2 bejkarna PocketBook 3 09-12-2014 06:46 PM
Pocketbook 360 - unresponsive buttons - Help? readerreader PocketBook 11 06-30-2010 05:08 AM


All times are GMT -4. The time now is 04:23 PM.


MobileRead.com is a privately owned, operated and funded community.