duagon MC50M - Error Codes Signaled by Status LED

To Next Page

To Previous Page

Functional Description

20MC50M00 E5



2020-10-20

3.4.4.1 CPU Board Status LED

Table 8. CPU status LED at front panel

Error Codes

In case of an error, the LED displays the following error messages by repeatedly flashing

n times, then pausing for one second, and then repeating the error code:

Table 9. Error codes signaled via status LED flashes

Label Color Function

2 Yellow Indicates MC50M status messages:

 On: MC50M firmware starting

 Off: MC50M is switched off

 Blinking: MC50M is in stand-by (S3) status

 Blinking with n flashes: Error code

During normal operation the LED can be switched on and

off using software.

Number of Flashes Error

1 +3.3 V failure

2 Input voltage failure

3 External power supply failure

4CPU too hot

5 MC50M firmware timeout

>5 Internal error

See the ACPI Specification for more details on the power states S0 to S5:

Advanced Configuration and Power Interface Specification

Unified EFI Forum

uefi.org/specifications