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About Your System 15
Diagnostics Indicator Codes
The four diagnostic indicator lights on the system front panel 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 1-5 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 Before POST
Code Power
Light
Causes Corrective Action
off No electrical power is
supplied to the computer.
Connect the computer to a working electrical
outlet.
If the problem is still not resolved, see "Getting
Help" on page 123.
green Normal operation None
off Normal off condition; the
system is connected to an
electrical outlet.
Press the power button to turn the computer on.
If the system does not turn on and the power light
is off, see "Getting Help" on page 123.
(blinking)
amber The BIOS is not executing. Ensure that the processor is seated correctly and
restart the system. See "Microprocessor" on
page 73).
If the problem persists, see "Getting Help" on
page 123.
(blinking)
blinking
amber
A possible power supply or
power cable failure has
occurred.
Check the power supply connections and the
condition of cables. See "Installing the Power
Supply" on page 82.
If the problem persists, see "Getting Help" on
page 123.
(blinking)
amber A possible power supply
failure has occurred.
Verify that both power supply cables are plugged in
to the system board. See "Installing the Power
Supply" on page 82.
If the problem persists, see "Getting Help" on
page 123.
(blinking)
amber A possible system board
failure has occurred.
See "Getting Help" on page 123.
book.book Page 15 Monday, June 5, 2006 1:51 PM