I haven't replied because I don't repair the 100 series Designjets. They're called HP's 'ultra low-end' for a reason. I don't think they were meant to be repaired.. and certainly aren't priced to be. But as Lance said, a picture is needed of the error because you have to count those dots to know what the error code is.
FoxitReader_2017-06-24_09-02-15.jpg
I don't see anything in the manual about replacing the ISS that needs to be done. If you connect the old one does the error change or go away?
Kiran
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