Dell R 420 Manual

Error CodeMessage InformationSEC0031MessageThe chassis is open while the power is on.
LCD MessageIntrusion detected. Check chassis cover.
DetailsThe chassis is open. System performance may be degraded, and 
security may be compromised.
ActionClose the chassis. Check system logs.
SEC0033MessageThe chassis is open while the power is off.
LCD MessageIntrusion detected. Check chassis cover.
DetailsThe chassis was opened while the power was off. System security 
may have been compromised.
ActionClose the...

Error CodeMessage InformationActionRe-configure system to the minimum supported configuration. If issues persists, contact support.TMP0118MessageThe system inlet temperature is less than the lower warning 
threshold.
LCD MessageSystem inlet temperature is outside of range.
DetailsAmbient air temperature is too cool.
ActionCheck the system operating environment.
TMP0119MessageThe system inlet temperature is less than the lower critical threshold.
LCD MessageSystem inlet temperature is outside of range....

Error CodeMessage InformationAction1.Review system logs for power supply exceptions.
2.Re-configure the system to minimum configuration, inspect and reinstall system cables.
3.If the issue persists, see Getting Help.
Warning Messages
A warning message alerts you to a possible problem and prompts you to respond before the system continues a task. 
For example, before you format a hard drive, a message warns you that you may lose all data on the hard drive. Warning 
messages usually interrupt the task and...

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Getting Help
Contacting Dell
NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, 
packing slip, bill, or Dell product catalog.
Dell provides several online and telephone-based support and service options. Availability varies by country and  product, and some services may not be available in your area. To contact Dell for sales, technical support, or customer 
service issues:
1.Visit dell.com/support
2.Select your support category.
3.Verify...