HP 1055CMHP - Manual (Page 16)

Troubleshooting
1-4
HP DesignJets 1050C and 1055CM Printers Service Manual
Front-Panel LEDs Flash Briefly at Power ON &
Nothing Else Happens
The Power Supply detects a Short and shuts down the Power.
1 The Hard Disk Drive or the Network Card could be faulty.
Troubleshoot the problem as follows:
a If the Printer has a Hard Disk Drive and/or a Network card
installed, switch the Printer OFF from the back of the Printer, and
remove them both.
b Switch the Printer ON again.
c If the Printer functions correctly now, switch the Printer OFF
again and reinstall the Network Card correctly, making sure that
the two installation screws are completely tightened.
NOTE If the Printer DOES NOT function correctly with the Hard Disk
Drive and the Network Card removed, then you must replace the
Electronics Module.
d Switch the Printer ON again
e If the Printer functions correctly with the Network Card installed,
switch the Printer OFF again.
NOTE If the Printer DOES NOT function correctly with the Network
Card installed, then you must replace it.
f Reinstall the Hard Disk Drive correctly, making sure that the two
installation screws are completely tightened.
g Switch the Printer ON again
h Check if the Printer functions correctly with the Hard Disk Drive
installed.
NOTE If the Printer DOES NOT function correctly with the Hard Disk
Drive installed, then you must replace it.
2 Make sure that none of the cables connected to the Electronics
Module have been pinched between the cover and the sideplate.