HP 340 Series Service Manual page 54

Installation
To install the processor board:
1. Replace the SPU card guides on each side. Both card guides are the same and can be
installed on either side of the processor board.
2. Replace the other assemblies in the reverse order listed in the Preliminary Requirements.
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CAUTION
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The capacitor-washer between the rear panel and the lockwasher on
the ThinLAN BNC connector is extremely fragile and is easily broken.
DO NOT tighten the ThinLAN port locknut too much.
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Assembly Replacement