Need Help HP L26500 Initialising error 79:04

[Broke-Boy]

Desperate for some Help.
After not using my HP Latex L260 (L26500) printer for around 2 months, it gets stuck on initialising Please Wait when Booting up (turning on)
Loads up the HP Load screen where it counts down then Moves on to the Initialising please wait screen with an hour glass spinning. It will stay on this initialising screen for a long time (20 mins to a hour)
It will then Say error 79:04 Please restart the Printer.
I then use the switch on the back to turn it off and back on again.
I can get into the Diagnostics Menu using the 3 Button trick but cannot perform any tests as i get the same error code, 79:04 Please Restart The Printer.
I have used the Web Server to Upload updated firmware, nothing has changed.
Anyone have any ideas?

 

[balstestrat]

Did you try to take out all the ink and printheads then start it?

 

[Ian Stewart-Koster]

what does the service manual say about 79:04 ?
(it's a 780 page manual you can find and download)