IBM JS20 Hardware Maintenance Manual - Page 97
System-board, locations, Replacing, system, board
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UPC - 000435230263
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System-board LED locations The following illustration shows the location of the LEDs on the system board. DIMM 3 error LED (CR46) DIMM 1 error LED (CR40) DIMM 2 error LED (CR45) DIMM 4 error LED (CR53) Microprocessor 0 error LED (CR19) Temperature error LED (CR16) Light Path Diagnostics (SW1) Microprocessor 1 error LED (CR58) Service processor error LED (CR27) NMI error LED (CR17) System board error LED (CR20) Reserved (CR29) Note: Error LED CR29 is reserved. Replacing the system board Complete the following steps to replace the system-board assembly: 1. Read the safety information beginning on page iii and "Installation guidelines" on page 71 2. If the blade server is operating, shut down the operating system by typing the shutdown -h now command. Refer to your operating system documentation. If the blade server was not turned off, press the power-control button (behind the blade-server control-panel door) to turn off the blade server. See "Blade server controls and LEDs" on page 14 for more information about the location of the power-control button. 3. Remove the blade server from the BladeCenter unit (see "Removing the blade server from the BladeCenter unit" on page 73 for information). The faulty system-board assembly is attached to the blade server. 4. Open the blade server cover (see "Opening the blade server cover" on page 74 for instructions). 5. Remove the blade-server bezel assembly (see "Removing the blade server bezel assembly" on page 75). Chapter 9. Installing options 87
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