HP Netserver L Server series - Manual (Page 97)

Chapter 9 Connecting the Monitor, Keyboard, Mouse, and UPS
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Removing a Power Supply Module
If only one power supply module is used, it must be installed in power supply
bay 2, and a power supply filler panel must be inserted in the empty bay 1.
CAUTION Operating the HP Netserver without a power supply
filler panel in an empty power supply bay could cause
excessive EMI or thermal damage to the Netserver.
1. Pinch the release lever on the power supply module and pull on the lever to
slide module out of the power bay. See Figure 9-6.
Figure 9-6. Removing a Power Supply Module