Hello everyone who can give me and advise.
My 7880 after purging line from erroneously refilled cartridge ( see the previous issue here Solved: Bad print with good nozzle check 7880 ) started making some strange humming noise About 6 seconds on, 6 seconds off. Continuously. Even when machine is idle. It stops only after I lift one of the cartridge levers.
This is issue number one.
Issue number 2 is: while lifting one of the levers. the lever broke, so we ordered new lever from China, replaced and and…meanwhile we saw, that the lines are full of air.Big gaps of air.
Might that be a reason for the humming noise?
1.How to get rid of the noise?
2.How to get rid of the air in the lines?
attaching photo with the opened at a time printer
Would appreciate help greatly