Diagnostics Indicator Codes - Dell POWEREDGE 840 Hardware Owner's Manual

Diagnostics Indicator Codes

Four diagnostic indicator lights are located behind the bezel on the I/O control panel. To access the
lights, see "Opening the System" on page 43. These lights display error codes during system startup.
Table 1-4 lists the causes and corrective actions associated with these codes and the power light status
before system POST. Table 1-6 lists the causes and possible corrective actions for these codes during
POST. A highlighted circle indicates the light is on; a non-highlighted circle indicates the light is off.
Table 1-4. Diagnostic Indicator Codes
Code
A B C D
A B C D
A B C D
A B C D
A B C D
A B C D
= y e l l o w
= g r e e n
= o f f
Causes
No power is applied to
the system.
A possible processor
failure has occurred.
Memory failure.
Possible expansion-card
failure.
Possible video card
failure.
Diskette or hard-drive
failure.
Corrective Action
See "Troubleshooting Power Supplies" on
page 98.
See "Troubleshooting the Microprocessor" on
page 109.
See "Troubleshooting System Memory" on
page 100.
See "Troubleshooting Expansion Cards" on
page 108.
See "Troubleshooting Expansion Cards" on
page 108.
Ensure that the diskette drive and hard drive(s)
are properly connected. See "Hard Drives" on
page 53 for information on the drive(s)
installed in your system.
About Your System
15