Dell 990 service manual Specifications, Contacting Dell

Shutdown failure	89
Time-of-day clock stopped	89
Time-of-day not set-please run the System Setup program	90
Timer chip counter 2 failed	90
Unexpected interrupt in protected mode	90
WARNING: Dell's Disk Monitoring System has detected that drive [0/1] on the
[primary/secondary] EIDE controller is operating outside of normal
specifications. It is advisable to immediately back up your data and replace
your hard drive by calling your support desk or Dell	90
Write fault	90
Write fault on selected drive	91
X:\ is not accessible. The device is not ready	91
21 Specifications	93
Technical Specifications	93
22 Contacting Dell	103
Contacting Dell	103