Field service information
This chapter details the safety precautions that must be taken before disassembling the systems. It also lists the detailed
disassembly and assembly instructions along with related information such as screw list and tool requirements.
Topics:
• Screw size list
• Recommended tools
• Critical callouts
• Working on your computer
• Disassembly and reassembly
Screw size list
Table 1. OptiPlex 5055
Component Secured to Screw type Quantity Image
System board System chassis #6.32X1.4 8
PSU 3
SD card module System chassis #6.32x3.6L 1
Recommended tools
The procedures in this document require the following tools:
● Small flat blade screwdriver
● Phillips # 1 screwdriver
● Small plastic scribe
Critical callouts
Key disassembly instructions along with important replacement instructions are called out to ensure the field technicians take
into account this information before removing or replacing any components.
Trusted Platform Module
Trusted Platform Module (TPM) is a dedicated cryptoprocessor designed to secure hardware by integrating cryptographic keys
into devices. A software can use a Trusted Platform Module to authenticate hardware devices. As each TPM chip has a unique
and secret RSA key burned in as it is produced, it can perform the platform authentication.
NOTE:
Trusted Platform Module (TPM) is part of the system board. In an event of system board replacement, the
encryption needs to be suspended in the OS and re-enabled on new system board's BIOS prior to resuming the encryption.
CAUTION: Attempt to replace the system board without prior suspending the encryption, will cause operating
system corruption and may eventually lead to No-Boot scenario.
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Field service information 9
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