HP 1055CMHP - Manual (Page 85)

Service Tests and Utilities
4-11 HP DesignJets 1050C and 1055CM Printers Service Manual
WARNING IF THIS TEST PASSES, DO NOT REPLACE THE EIO CARD.
If there is a problem with the EIO Card then the test will fail and the
following message will appear on the front panel:
NOTE Check that the EIO Card is actually installed before starting to
troubleshoot. If the EIO Card is NOT installed, the test will of
course always fail.
In this case, to resolve the problem, try the following:
1 Switch the printer OFF. Remove the Hard Disk Drive (if installed)
and reinstall the EIO Card making sure it installed correctly by
pushing it firmly inwards and checking that the two installation
screws are completely tightened. Switch the printer ON again and
repeat the EIO Card Test. If the EIO Card Test fails again then
replace the EIO card.
2 If the EIO Card Test passed after removing the Hard Disk Drive,
then switch the Printer OFF and reinstall the Hard Disk Drive,
making sure that the two installation screws are completely
tightened. Switch the Printer ON again and repeat the EIO Card
Test. If the EIO Card Test fails, then the Hard Disk Drive could be
faulty. Replace the Hard Disk Drive.
3 If the EIO Card Test continues to fail after replacing the EIO card or
the Hard Disk Drive, then replace the Electronics Module
⇒
Page
8-25.
WARNING Only replace one component at a time and try the Service Test
again before replacing another component. Using this procedure
you will be able to determine exactly which component failed.
EIO CARD
Possible Failure on:
1. EIO CARD
Code: 00XXXX:0000XX
2. Electronics Module