Dell OptiPlex 5055 Ryzen CPU Tower OptiPlex 5055 Tower Owners Manual - Page 15

Before working inside your computer, Safety precautions, Standby power, Bonding

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Before working inside your computer To avoid damaging your computer, perform the following steps before you begin working inside the computer. 1. Ensure that you follow the safety precautions. 2. Ensure that your work surface is flat and clean to prevent the computer cover from being scratched. 3. Turn off your computer. 4. Disconnect all network cables from the computer. CAUTION: To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from the network device. 5. Disconnect your computer and all attached devices from their electrical outlets. 6. Press and hold the power button while the computer is unplugged to ground the system board. NOTE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface at the same time as touching a connector on the back of the computer. After working inside your computer After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your computer. 1. Connect any telephone or network cables to your computer. CAUTION: To connect a network cable, first plug the cable into the network device and then plug it into the computer. 2. Connect your computer and all attached devices to their electrical outlets. 3. Turn on your computer. 4. If required, verify that the computer works correctly by running the diagnostic tool. Safety precautions The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions. Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or reassembly: • Turn off the system and all attached peripherals. • Disconnect the system and all attached peripherals from AC power. • Disconnect all network cables, telephone, and telecommunications lines from the system. • Use an ESD field service kit when working inside any desktop to avoid electrostatic discharge (ESD) damage. • After removing any system component, carefully place the removed component on an anti-static mat. • Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted. Standby power Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep mode and has other advanced power management features. Unplug the AC power cord, press and hold the power button for 15 seconds to discharge residual power in the system board, desktops. Bonding Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through the use of a field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry such as watches, bracelets, or rings prior to bonding yourself and the equipment. Field service information 15

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Before working inside your computer
To avoid damaging your computer, perform the following steps before you begin working inside the computer.
1.
Ensure that you follow the safety precautions.
2.
Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
3.
Turn off your computer.
4.
Disconnect all network cables from the computer.
CAUTION:
To disconnect a network cable, first unplug the cable from your computer and then unplug the cable from
the network device.
5.
Disconnect your computer and all attached devices from their electrical outlets.
6.
Press and hold the power button while the computer is unplugged to ground the system board.
NOTE:
To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching
an unpainted metal surface at the same time as touching a connector on the back of the computer.
After working inside your computer
After you complete any replacement procedure, ensure that you connect any external devices, cards, and cables before turning on your
computer.
1.
Connect any telephone or network cables to your computer.
CAUTION:
To connect a network cable, first plug the cable into the network device and then plug it into the
computer.
2.
Connect your computer and all attached devices to their electrical outlets.
3.
Turn on your computer.
4.
If required, verify that the computer works correctly by running the diagnostic tool.
Safety precautions
The safety precautions chapter details the primary steps to be taken before performing any disassembly instructions.
Observe the following safety precautions before you perform any installation or break/fix procedures involving disassembly or reassembly:
•
Turn off the system and all attached peripherals.
•
Disconnect the system and all attached peripherals from AC power.
•
Disconnect all network cables, telephone, and telecommunications lines from the system.
•
Use an ESD field service kit when working inside any desktop to avoid electrostatic discharge (ESD) damage.
•
After removing any system component, carefully place the removed component on an anti-static mat.
•
Wear shoes with non-conductive rubber soles to reduce the chance of getting electrocuted.
Standby power
Dell products with standby power must be unplugged before you open the case. Systems that incorporate standby power are essentially
powered while turned off. The internal power enables the system to be remotely turned on (wake on LAN) and suspended into a sleep
mode and has other advanced power management features.
Unplug the AC power cord, press and hold the power button for 15 seconds to discharge residual power in the system board, desktops.
Bonding
Bonding is a method for connecting two or more grounding conductors to the same electrical potential. This is done through the use of a
field service electrostatic discharge (ESD) kit. When connecting a bonding wire, ensure that it is connected to bare metal and never to a
painted or non-metal surface. The wrist strap should be secure and in full contact with your skin, and ensure that you remove all jewelry
such as watches, bracelets, or rings prior to bonding yourself and the equipment.
Field service information
15