Owners Manual

Diagnostics
The computer POST (Power On Self Test) ensures that it meets the basic computer requirements and the hardware is working
appropriately before the boot process begins. If the computer passes the POST, the computer continues to start in a normal mode.
However, if the computer fails the POST, the computer emits a series of LED codes during the start-up. The system LED is integrated on
the Power button.
The following table shows dierent light patterns and what they indicate.
Table 3. Power LED summary
Amber LED state White LED state System state Notes
O O S5
O Blinking S3, no PWRGD_PS
Previous State Previous State S3, no PWRGD_PS This entry provides for the
possibility of a delay from
SLP_S3# active to PWRGD_PS
inactive.
Blinking O S0, no PWRGD_PS
Steady O S0, no PWRGD_PS, Code fetch
= 0
O Steady S0, no PWRGD_PS, Code fetch
= 1
This indicates that the host BIOS
has started to execute and the
LED register is now writable.
Table 4. Amber LED blinking failures
Amber LED state White LED state System state Notes
2 1 Bad MBD Bad MBD - Rows A, G, H, and J
from table 12.4 of SIO Spec -
Pre-Post indicators [40]
2 2 Bad MB, PSU or cabling Bad MBD, PSU or PSU cabling -
Rows B, C and D of table 12.4
SIO spec [40]
2 3 Bad MBD, DIMMS, or CPU Bad MBD, DIMMS or CPU -
Rows F and K from table 12.4 of
SIO spec [40]
2 4 Bad coin cell Bad coin cell - Row M of table
12.4 in SIO spec [40]
Table 5. States Under Host BIOS Control
Amber LED state White LED state System state Notes
2 5 BIOS state 1 BIOS Post code (Old LED
pattern 0001) Corrupt BIOS.
2 6 BIOS state 2 BIOS Post code (Old LED
pattern 0010) CPU cong or
CPU failure.
2 7 BIOS state 3 BIOS Post code (Old LED
pattern 0011) MEM cong in
90 Troubleshooting your computer