Boot Loop/Black Screen Nokia N950 - Page 3 - maemo.org

dattelfisch | # 21 | 2019-11-05, 21:51 | Report

Originally Posted by juiceme View Post

Well yes, for reviving a dead device it is a good thing to get to the serial console.

So,...what are my opportunities?
I think that I read somewhere that these pins are in the 3,5mm audio-input or under the sim-holder. I need to search for the IRC-logs I recently saw to this topic.

If there is a little chance that this device can be get back to life, I'm going to try it.

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juiceme | # 22 | 2019-11-05, 22:36 | Report

Info on the serial pins of N9, for example here; https://talk.maemo.org/showthread.ph...serial&page=20

And here's what you need; https://talk.maemo.org/showpost.php?...6&postcount=41

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nonsuch | # 23 | 2019-11-08, 06:59 | Report

This can't hurt either:
https://wiki.maemo.org/N950

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dattelfisch | # 24 | 2019-11-10, 11:46 | Report

Originally Posted by juiceme View Post

Info on the serial pins of N9, for example here; https://talk.maemo.org/showthread.ph...serial&page=20

And here's what you need; https://talk.maemo.org/showpost.php?...6&postcount=41

So I disassambled my device but I don't think there are any additional data pins under the SIM-card socket. Please correct me if I'm wrong.

Here are some pictures:

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I also tried to install nemo as mentioned here:
https://talk.maemo.org/showpost.php?...9&postcount=47

But the screen keeps black after showing the Nokia logo.

Maybe the files that I use aren't matching to the device:
- nemo-n950-rnd-20140224.tar.bz2
- moslo-0.0.13.2-1.5.Nemo.Adaptation.N9xx.armv7hl.rpm

Procedure:

Code:

rpm2cpio moslo-n9-*.armv7hl.rpm | cpio -vidu

Code:

sudo flasher -k usr/share/moslo-n9/zImage-moslo -n usr/share/moslo-n9/initrd-moslo -l -b

Code:

sudo tar --numeric-owner -xf nemo-n950*.tar.bz2 -C /media/Alt_OS/

Last edited by dattelfisch; 2019-11-10 at 13:18.

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juiceme | # 25 | 2019-11-11, 17:17 | Report

Ah, I assumed N950 mirrors N9 in his regard (I am not at all familiar with the N950)
However I am sure the serial pins are there somewhere.

Halftux | # 26 | 2019-11-11, 18:14 | Report

Originally Posted by juiceme View Post

Ah, I assumed N950 mirrors N9 in his regard (I am not at all familiar with the N950)
However I am sure the serial pins are there somewhere.

There are somewhere on the right side. There is a row with 12 contacts and one with 11 contacts. Try to find all ground pins. Then probing and find with an oscilloscope the tx pin (uart 2.6V-3.3V signal), check for voltage before connecting.
Look at the ground pin which is close to the determind tx pin. Probably one of the neighbour pins (from ground) is the rx pin, which should be also close to the tx pin maybe one mbus signal in between. The neighbour pin could also be diagonal to the other row. Rx and tx pin should reside on the same row with this kind of two row pattern.

Or ask some developer on irc or mail. I would suggest rainisto or pali.

Last edited by Halftux; 2019-11-11 at 23:56.

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