Dell POWEREDGE R805 Hardware Owner's Manual page 145

Action
CAUTION:
Only trained service technicians are authorized to remove the system
cover and access any of the components inside the system. Before performing any
procedure, see your Product Information Guide for complete information about
safety precautions, working inside the computer and protecting against
electrostatic discharge.
1 Turn off the system and attached peripherals, and disconnect the system
from the electrical outlet.
2 Open the system. See "Opening and Closing the System" on page 70.
3 Remove all expansion cards installed in the system. See "Removing an
Expansion Card" on page 92.
4 Let the system dry thoroughly for at least 24 hours.
5 Close the system. See "Opening and Closing the System" on page 70.
6 Reconnect the system to the electrical outlet, and turn on the system and
attached peripherals.
If the system does not start properly, see "Getting Help" on page 175.
7 If the system starts properly, shut down the system and reinstall all of the
expansion cards that you removed. See "Installing an Expansion Card" on
page 91.
8 Run the appropriate online diagnostic test. See "Using Server
Administrator Diagnostics" on page 161.
If the tests fail, see "Getting Help" on page 175.
Troubleshooting Your System
145