Lenovo ThinkStation PX Hardware Maintenance Manual page 118

For access, remove the following parts in order:
• Remove the left side cover. See "Left side cover" on page 72.
• Remove the CPU duct. See "CPU duct" on page 75.
• Remove the front fan assembly. See "Front fan assembly" on page 79.
• Remove the front fan bracket. See "Front fan bracket" on page 81.
• Remove the rear fan assembly. See "Rear fan assembly" on page 83.
• Remove the memory fan duct. See "Memory fan" on page 109.
Removal steps
Remove the memory module.
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PX Hardware Maintenance Manual