Fatal error HP 1320 after 1e print job. What is the 2nd fatal code telling me ?

[digital_hobbies]

After the 1e print job, the printer ends up in a fatal error. Going into this fatal error I get the following blinking combination (created by me, based on the pics in the service manual). When I turn off the printer and wait, I can print a next single job.

Which part is at fault in this printer? (This error combination can not be found in the service manual)

[Valsimot]

Print yourself an internal configuration and demo page to see how the printer prints. It could be something with your computer/driver.

[digital_hobbies]

!st of all, when it prints, it prints fine 😉 Good quality as defined by HP.

When I power on the printer, this issue is most of the time not there. When I leave the printer on and attached to the network, the fatal error occurs within minutes. If turned on and print almost directly, the first job can finish (depending on the total pages in the job) and then it ends in that fatal error.

When I disconnect the network cable, the fatal error does not occur over time. It seems ( but I just installed it) that USB printing is without the fatal error. But I can't conclude that based on the leds blinking when looking for the details of the fatal error

[digital_hobbies]

I uploaded a video via wetransfer for this issue, so you can see what is happening. Link will only valid for 7 days

https://we.tl/t-C491qTqkg1

Replacing the controller board did not improve this and I though it was resolved, because for several days there was no issue. But... the issue did come back unfortunately...