HP Jetdirect 175x Print Server series - Manual (Page 58)

Blinking
(amber) Might be a hardware fault (for example, a short-circuit, faulty cable, or a printer
drawing too much power).
To verify, disconnect the USB cable at the print server. Switch on the printer if it is
off. Power cycle the print server (unplug it and plug it back in). Then reconnect the
USB cable. If the USB light is now green and steady, then no problem remains.
Otherwise, if the USB light is still blinking amber, then there may be a faulty
component. Try these steps to determine which component might be causing the
problem:
●
Detach the USB cable and power cycle the print server (unplug it and plug
it back in). If the USB LED is green and steady, then the print server is
OK. If it is blinking amber, then the print server is faulty.
●
Try reconnecting the USB cable to the print server only, and power cycle
the print server (unplug it and plug it back in). If the USB LED is green
and steady, then the cable is also OK. If it is blinking amber, then the
cable may be faulty.
●
Power cycle the printer and reconnect the USB cable to the printer. If the
USB LED is green and steady, then the printer is also OK. If it is blinking
amber, then the printer may be faulty.
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