Dell Wyse 5470, Service Manual

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Working on your thin client
Safety instructions
Prerequisite
Use the following safety guidelines to protect your thin client from potential damage and to ensure your personal safety. Unless otherwise
noted, each procedure included in this document assumes that the following conditions exist:
• You have read the safety information that shipped with your thin client.
• A component can be replaced or, if purchased separately, installed by performing the removal procedure in reverse order.
About this task
WARNING: Disconnect all power sources before opening the thin client cover or panels. After you finish working inside the
computer, replace all covers, panels, and screws before connecting to the electrical outlet.
WARNING: Before working on your thin client, read the safety information that shipped with your thin client. For additional
safety best practices information, see the Regulatory Compliance home page at www.Dell.com/regulatory_compliance .
CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple
repairs as authorized in your product documentation, or as directed by the online or 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 ship with the product.
CAUTION: 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 thin client.
CAUTION: Handle components and cards with care. Do not touch the components or contacts on a card. Hold a card by its
edges or by its metal mounting bracket. Hold a component such as a processor by its edges, not by its pins.
CAUTION: When you disconnect a cable, pull on its connector or on its pull-tab, not on the cable itself. Some cables have
connectors with locking tabs; if you are disconnecting this type of cable, press in on the locking tabs before you disconnect the
cable. As you pull connectors apart, keep them evenly aligned to avoid bending any connector pins. Also, before you connect a
cable, ensure that both connectors are correctly oriented and aligned.
NOTE: The color of your thin client and certain components may appear differently than shown in this document.
Before working on your thin client
You must perform the following steps before you work on the thin client:
About this task
NOTE: For more safety best practices, see the Regulatory Compliance home page at www.Dell.com/regulatory_compliance .
Steps
1 Save and close all open files and exit all open applications.
2 Click Start > Power > Shut down to shut down your thin client.
NOTE: For shutdown instructions, see documentation of the respective operating system at www.Dell.com/support .
3 Disconnect your thin client and all the attached devices from their electrical outlets.
4 Disconnect all network cables from your thin client.
5 Disconnect all attached devices and peripherals, such as keyboard, mouse, and external monitor, from your thin client.
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6 Working on your thin client