Intel SX220 Technical Reference, Server Board Jumpers, Diagnostic LEDs, 129, Configuration Jumper

9. Technical Reference

Server Board Jumpers

		Figure 49: Server Board Jumpers
Table 40: Configuration Jumper
Jumper	Pins	What it does at system reset
Name
BMC WP	A	BMC boot block is write protected (normal operation). If these pins are not
		jumpered, BMC boot block is erasable and programmable at next reset.
CMOS CLR	B	If these pins are jumpered, the CMOS settings are cleared. These pins should
		not be jumpered for normal operation.
PSWD CLR	C	If these pins are jumpered, the CMOS password is cleared. These pins
		should not be jumpered for normal operation.
RCVRY	D	If these pins are jumpered, the system will attempt BIOS recovery. These pins
BOOT		should not be jumpered for normal operation.

Diagnostic LEDs

To help diagnose POST failures, a set of four bi-colour diagnostic LEDs is located on the back edge of the baseboard. Each of the four LEDs can have one of four states: Off, Green, Red, or Amber.

The LED diagnostics feature consists of a hardware decoder and four dual colour LEDs. During POST, the LEDs will display all normal Port80 codes representing the progress of the BIOS POST. Each postcode will be represented by a combination of colours from the 4 LEDs. The LEDs are in pairs of green and red. The post codes are broken into two nibbles, an upper and a lower nibble. Each bit in the upper

Viglen SX220 User Guide 129