Stop wasting ink printing large pictures. All information needed is in the nozzle test and you took that so far away.
I am thinking you transported it without removing the ink and the head became uncapped. Ink on the motherboard a issue, if it sat there for a while it will eat through any protective coating and short out some thing(s). That needs to be cleaned with alcohol while machine is unplugged. If fuses had blown you would have been lucky to know where the issue is. You may have to replace the mainboard. You say not used for 8 months, is that plugged in and not used or not plugged in? At the minimum, captops are required and a few powerful cleans. It would not hurt to do a 48 hr headsoak on the old tops and then change them. Your question to determine - no printing - clog issue or electrical issue.
I would do a head soak, because nothing to lose and not on for 8months is ink dried in the nozzles. You are pushing more ink possibly into clogged nozzles so something will give. On the other hand, the fuses may be good because the head is not blowing them, but the board is damaged and you are not getting the ink. The printing of the label and that of the nozzles are driven from two different areas of the board.
are you showing me the waste side of the pump
did you do the head soak
the waste side does not have ink unless the pump is sending waste ink from captops
I would have to look your machine up - if it is the older one - then you need the crank tool to lower the cap station - then move to the left - fill with cleaner - move to right, then crank back up
You can search other post where I posted many times on headsoaks. But what you need to do briefly:
- unplug machine
- clamp hoses under tops
- unlock head
- Move head
- fill tops with OEM cleaner
- Return Head
- Lock Head
- after 24 hours check and add more cleaner if required
- another 24 hrs to total 48
- after - do 2 powerful clean then nozzle test - post that test
- it will look worst before better
- change of tops will be necessary - so do on old tops if you have
Machine needs to stay unplugged during soak to prevent auto cleaning
remember to unclamp lines
Do not see the original to see the starting point. I see only one test - and the magenta looks like it suffered a head strike.