Turning the memory expansion module on and offThis topic explains how to turn the memory expansion module on and off.Because the memory expansion module is controlled by the server, turning on thememory expansion module refers to connecting the memory expansion modulepower cord into the power source and pressing the power-control button on a hostserver that is connected to the memory expansion module and is configured toidentify the expansion module. Normally, the operating system on the server starts,and the server issues a power-on request to the memory expansion module. Thememory expansion module is turned off only if the connected server issues apower-off request, and you have disconnected the memory expansion modulepower cord from the power source. You cannot turn off the memory expansionmodule manually.Statement 5CAUTION:The power control button on the device and the power switch on the powersupply do not turn off the electrical current supplied to the device. The devicealso might have more than one power cord. To remove all electrical current fromthe device, ensure that all power cords are disconnected from the power source.12You can disconnect the memory expansion module power cords from the powersource to shut off all power immediately without damaging the memory expansionmodule, but it might cause an unrecoverable error and loss of data on theconnected server.Memory expansion module internal connectors and buttonsThis section provides illustrations showing the internal connectors and buttons onthe memory expansion module system-board tray.The illustrations in this section show the internal connectors and buttons on thememory expansion module system-board tray. The illustrations might differslightly from your hardware.34 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
