IBM HS40 User Guide - Page 28
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UPC - 000435160188
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LED locations The following illustrations show the LEDs and LED power switches on the processor board and I/O board. You need to remove the blade server from the BladeCenter unit, open the cover, and press one of the light path diagnostics buttons to light any error LEDs that were lit during blade server operation. These LEDs will remain lit for a maximum of 25 seconds. See "Light path diagnostics" on page 72 for detailed information about this feature. The following illustration shows the LEDs on the processor board. Microprocessor 2 error LED (DS5H4) Microprocessor 1 error LED (DS5H5) Microprocessor 4 error LED (DS5H2) Light path diagnostics button (SW9J1) 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 14 BladeCenter HS40 Type 8839: Installation and User's Guide