Before Working Inside Your System; After Working Inside Your System; Recommended Tools - Dell EMC PowerEdge R940 Installation And Service Manual

telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by
your warranty. Read and follow the safety instructions that are shipped with your product.
NOTE: It is recommended that you always use an antistatic mat and antistatic strap while working on components inside
the system.
CAUTION: To ensure proper operation and cooling, all bays in the system and system fans must be always
populated with a component or a blank.

Before working inside your system

Prerequisites
Follow the safety guidelines listed in
Steps
1. Turn off the system, including all attached peripherals.
2. Disconnect the system from the electrical outlet and disconnect the peripherals.
3. Remove the system cover.

After working inside your system

Prerequisites
Follow the safety guidelines listed in
Steps
1. Install the system cover.
2. Reconnect the peripherals and connect the system to the electrical outlet.
3. Turn on the attached peripherals and then turn on the system.

Recommended tools

You need the following tools to perform the removal and installation procedures:
● Key to the bezel lock
The key is required only if your system includes a bezel.
● Phillips #1 screwdriver
● Phillips #2 screwdriver
● Torx #T30 screwdriver
● Torx #T8 screwdriver
● Wrist grounding strap
You need the following tools to assemble the cables for a DC power supply unit:
● AMP 90871-1 hand-crimping tool or equivalent
● Tyco Electronics 58433-3 or equivalent
● Wire-stripper pliers to remove insulation from size 10 AWG solid or stranded, insulated copper wire
NOTE: Use alpha wire part number 3080 or equivalent (65/30 stranding).
30 Installing and removing system components
Safety instructions on page 29.
Safety instructions on page 29.