MobileRead Forums - View Single Post - What can I do with my semi-functional PW3 motherboard to help people out?

coplate · 05-11-2017, 09:44 PM

Since it was already broken, i went ahead and used my 3.3v uart to connect to it, it didn't explode, but I know it's a bad idea. :-)

So any children listening at home: "Don't try this."

I was able to prop a needle in place for the UART RX pin, but I have to hold the TX pin in place, since the contact really is only the size of a pinhead after I ripped the pads off.

I am able to interrupt this:

Code:

Hit any key to stop autoboot:  0
uboot >

But the other option to enter recovery mode still crashes without a screen, though I confirmed it does work with a screen.

Code:

Press [ENTER] for recovery menu...       

=== kernel printk buffer (23556 bytes) ===
<5>[    0.000000] Linux version 3.0.35-lab126 (jenkins-official@sjc10-jbuild11) (collect2: error: ld returned 1 exit status) #1 PREEMPT Fri Jun 3 00:56:12 PDT 2016
<4>[    0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d

etc.

So at this point, it does not appear that I can make this a headless tool to play with, so I am going to be putting the screen back together with the replacement logic board I bought, and putting this with the old water damaged battery, in case I can score a broken screen that has a good firmware on the cable - this weekend probably.

If anyone has anything they really want me to do this week, throw out ideas, and I'll see if I can figure it out.

05-11-2017, 09:44 PM	#29
coplate Guru Posts: 645 Karma: 1888888 Join Date: Jun 2009 Device: prs-505, Kindle Keyboard 3g, PW3	Since it was already broken, i went ahead and used my 3.3v uart to connect to it, it didn't explode, but I know it's a bad idea. :-) So any children listening at home: "Don't try this." I was able to prop a needle in place for the UART RX pin, but I have to hold the TX pin in place, since the contact really is only the size of a pinhead after I ripped the pads off. I am able to interrupt this: Code: Hit any key to stop autoboot: 0 uboot > But the other option to enter recovery mode still crashes without a screen, though I confirmed it does work with a screen. Code: Press [ENTER] for recovery menu... === kernel printk buffer (23556 bytes) === <5>[ 0.000000] Linux version 3.0.35-lab126 (jenkins-official@sjc10-jbuild11) (collect2: error: ld returned 1 exit status) #1 PREEMPT Fri Jun 3 00:56:12 PDT 2016 <4>[ 0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d etc. So at this point, it does not appear that I can make this a headless tool to play with, so I am going to be putting the screen back together with the replacement logic board I bought, and putting this with the old water damaged battery, in case I can score a broken screen that has a good firmware on the cable - this weekend probably. If anyone has anything they really want me to do this week, throw out ideas, and I'll see if I can figure it out.