Piromoni o-tron HAT suddenly stop working on Raspberry, Pi 3 model B+ without any discernible reason

@emanuele.piergallini wrote:

Hi,

I have a
Raspberry, Pi 3 modello B+ bought on amazon and your piromoni o-tron HAT.

Display works well for many days receiving data from my custom python program. Suddenly stops showing any messages and backlight does’t work anymore with none reason. If a run a demo compare this message:

pi@raspberrypi:~/Pimoroni/displayotron/examples/dot3k/advanced $ sudo python backlight.py

Traceback (most recent call last):

File “backlight.py”, line 5, in <module>

import dot3k.backlight as backlight

File “/usr/local/lib/python2.7/dist-packages/dot3k/backlight.py”, line 1, in <module>

import sn3218, colorsys, math

File “/usr/lib/python2.7/dist-packages/sn3218.py”, line 114, in <module>

enable_leds(0b111111111111111111)

File “/usr/lib/python2.7/dist-packages/sn3218.py”, line 62, in enable_leds

[enable_mask & 0x3F, (enable_mask >> 6) & 0x3F, (enable_mask >> 12) & 0X3F])

IOError: [Errno 121] Remote I/O error

I have tried to install again os and piromoni libraries as showed in your instructions and upgrade os, but nothing was solved !!

My version of raspberry is :

RASPBIAN STRETCH WITH DESKTOP

Version: June 2018

Release date: 2018-06-27

Kernel version: 4.14

with command uname -a I obtain this string of Kernel version:

Linux raspberrypi 4.14.52-v7+ #1123 SMP Wed Jun 27 17:35:49 BST 2018 armv7l GNU/Linux

My question is I have a defected Raspberry ? or is your display O-tron HAT defected ? or either damaged ?

Help me please, because if either rpi or o-tron have been damage for any reason i tried to give back both to amazon.

Thanks in advance

Bye

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