Oracle X5-4 Service Manual page 234

Replace the Power Supply Backplane Board (FRU)
Note -
connection pads.
Ensure that the Locator indicator switch at the back of the server operates easily
23.
and is not stuck in the depressed position.
24. To secure the motherboard to the chassis, tighten the captive screw.
234 Oracle Server X5-4 Service Manual • December 2015
Ensure that the red and blue bus bar connectors are under the motherboard bus bar