Lexmark T520 Service Manual page 109

Infoprint 1120 and 1125
Note: The Quick Disk Test is a non-destructive test and indicates
Pass or Fail. If the test fails, replace the hard disk. If a problem still
exists, replace the hard disk board.
The "Disk Test/Clean" on page 3-3
the disk contains bad data and is unusable. This test is divided into a
cleaning and a verifying or testing section.
Warning: This can be a very lengthy test depending on the disk
size. This test leaves the hard disk unformatted. The servicer or user
must reformat the disk using the Format Disk Menu operation. This
is a destructive type of test. All the data on the disk is destroyed and
should not be performed on a known good disk.
Network Card Option
Note: The network is installed on the controller board on network
model printers.
Error Code 976 - Network Card X (X=Network card 1, 2, or 3)
A 976 error code indicates an unrecoverable software error in
network card x. Verify that network card x is correctly installed in the
socket on the interconnect board and is properly grounded. If you
find no problem, contact your next level of support before replacing
the network card.
Error Code 977 - Network Card X
A 977 error displays when the RIP software detects that a network
card is installed in slot x on the interconnect board but cannot
establish communications with the network card.
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Service Manual
is used to help restore the disk if