Nortel Meridian Meridian 1 Maintenance Manual page 198

186 Chapter 4: Diagnosing faults
553-3211-510 Standard 1.0 October 1998
Check for the following problem indicators during system start-up:
¥ Fail (red) LED on the Application Module MVME147/167 card
remains lit after system start-up is completedÑreplace the
MVME147/167 card and reboot
¥ Fail (red) LED on the IPE Module remains lit after system start-up is
completedÑreplace the IPE Module, reload the software and reboot
¥ System Panic message appearsÑthe UNIX operating system may be
in trouble. This may require special technical assistance. Restart the
system. If the error persists, you may have to perform a reinstallation.
¥ SCSI I/O errors appearÑthe errors can look like the following:
Timeout on nnnnn SCSI device, where nnnnn is the device
name (such as CPU card, tape drive, or hard disk). If they appear,
check that the disk/tape unit is inserted properly.
¥ Physical Block errors appearÑthe errors can look like the following:
Physical Block: 0xDE0 (11744) Command Byte:74
Status Byte 1:24 (the numbers may be different). If this
occurs, the hard disk is probably faulty and should be replaced.