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Intel® Server Board Set SE8500HW4 Error Handling
Revision 1.0
Intel order number D22893-001
111
12. Error Handling
12.1 LEDs
12.1.1 POST Progress LEDs
The BIOS provides the current stage of the POST process via a block of eight LEDs. The LEDs
are shown in Table 88.
Table 88. POST Progress LED Location and Example
LED Reference Designator Bit Example: Initialize Memory
DS7D2 7 (MSB)
DS7D3 6
DS7D4 5 On
DS7D5 4
DS7D6 3
DS7E1 2 On
DS7E2 1 On
DS7E3 0 (LSB) On
0x27
Table 89. POST Progress LED Codes
Code Description
Host Processor:
0x10 Power-on initialization of the host processor (Boot Strap Processor)
0x11 Host processor cache initialization, including Application Processor (AP)
0x12 Starting AP initialization
0x13 SMM initialization
Chipset:
0x21 Initializing a chipset component
Memory:
0x22 Reading configuration data from memory (SPD on DIMM)
0x23 Detecting presence of memory
0x24 Programming timing parameters in the memory controller
0x25 Configuring memory parameters in the memory controller
0x26 Optimizing memory controller settings
0x27 Initializing memory, such as ECC init
0x28 Testing memory
PCI Bus:
0x50 Enumerating PCI busses
0x51 Allocating resources to PCI buses
0x52 PCI Hot Plug* controller initialization