IBM HS40 manual The following illustration shows the LEDs on the processor board

The following illustration shows the LEDs on the processor board.

Microprocessor 1 error LED (DS5H5) Microprocessor 4 error LED (DS5H2)

Light path diagnostics button (SW9J1)

Microprocessor 2 error LED (DS5H4)

Microprocessor 3 error LED (DS5H1)

Microprocessor mismatch error LED (DS5H3)

Microprocessor socket 1 Microprocessor socket 2

Light path diagnostics LED (green) (DS9J1)

DIMM 8

DIMM 7

DIMM 6

DIMM 5

DIMM 4

DIMM 3

DIMM 2

DIMM 1

DIMM 1 error LED (DS6C1) DIMM 2 error LED (DS6D1) DIMM 3 error LED (DS6D2) DIMM 4 error LED (DS6E1) DIMM 5 error LED (DS6F1) DIMM 6 error LED (DS6G1) DIMM 7 error LED (DS6G2) DIMM 8 error LED (DS6H1)

Microprocessor socket 3

Microprocessor socket 4

28BladeCenter HS40 Type 8839: Hardware Maintenance Manual and Troubleshooting Guide