HP DesignJet T790 and T1300 Printer Series - Using your printer

Troubleshooting
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The use of the external hard disk by any device other than an HP DesignJet is not supported and may cause
severe damage to the hard disk, which is not covered by the warranty.
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If the external hard disk has been previously inserted into a dierent HP DesignJet, the front panel displays:
External hard disk not valid for this machine. Power o, plug in the correct hard disk and power on again.
If you use an external hard disk with one HP DesignJet and then want to connect it to another:
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If the HP DesignJet has already had an external hard disk installed, you must uninstall it from the rst
HP DesignJet and then install it on the HP DesignJet you want to use.
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If the HP DesignJet has no external hard disk installed, the installation process starts and the contents
of the external hard disk are deleted.
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The printer's USB device port is incompatible with the external hard disk. While the external hard disk is
connected, the USB device port is disabled, it is not recognized by your computer's plug & play subsystem
and you cannot send jobs from your computer to the USB port. However, the USB host port still works, and
you can print jobs from a USB ash drive.
If you require a point-to-point connection between your computer and printer, without network
infrastructure, please use a standard Ethernet cable and install the driver from the HP Start-up Kit DVD in
network mode.
If you later disconnect the external disk drive, and resume use of the internal disk drive, you will be able to
use the USB device port again.
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The external hard disk should not be removed while the printer is on. If you remove it, the front panel
displays the following error message (64:1:01): USB HDD accessory disconnected. Please reconnect it and
restart the printer.
If you turn on the printer while the external hard disk is not connected, the same message is displayed.
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If the external hard disk is lost or broken, you must recongure the printer to use the internal hard disk.
Turn on the printer. Wait until you see all of the xed icons at the left and right of the front panel displayed
simultaneously. Then press three icons in the correct sequence: , then , then .
The front panel displays: Machine congured to use external hard disk. Do you want to revert the
conguration to internal hard disk? Press OK to continue.
Press OK.
The front panel displays: Machine recongured to use internal hard disk. Press OK to reboot the machine.
Press OK. The printer restarts, and you can then use the printer with its internal hard drive.
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