Tech Help — Designjet T1120

Question: "The printer says paper loaded incorrectly, remove paper. But there is no paper loaded. And it goes through the procedure to load the paper, but it doesn't recognize that the paper is unloaded. Any ideas on how to get past this unload issue? E.R." Answer: This may be caused by a firmware bug, and may not be a permanent issue. As a workaround, take a look under the printer and locate the out-of-paper sensor extension cable connector on the right-rear section under the machine. When the printer is in the "remove paper" condition, unplug that extension connector, and continue... Read more →

Question: "I think an electrical surge has made my printer not able to boot. I hear a beeping noise and it is blinking orange on the first light. Do you think it's the hard drive or formatter board? There is nothing displayed on the control panel. Just a blank white screen. E.R." Answer: A T1120 that beeps, blinks orange on the first light, and shows nothing but a blank white screen on the control panel is very likely suffering from a dead hard disk drive. The replacement hard disk is available here: Designjet T1120 2.5" SATA Hard Disk Drive (CK837-67026)... Read more →

This problem occurs in the following HP Designjet models: T610, T620, T770, T790, T1100, T1120, T1200, T1300, T2300, Z2100, Z3100, Z3200, Z5200, Z5400.  If your printer is rejecting HP 70 printheads or HP 72 printheads, or if the printheads seem generally unreliable, there's a good chance there's nothing wrong with the printheads themselves. Often the contacts on the trailing cable corrode, and fail to send a consistent signal to and from the printheads. If you're on your second or third replacement printhead, and about ready to put some creatively-placed holes in the printer, power the machine off, and check the... Read more →