NEC HX4500, Service & Reference Manual, Page: 116 / 196

4-44 Assembly and Disassembly Procedures
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Replacing the System I/O Board
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CAUTION
Electrostatic discharge (ESD) can damage components; place them
on an antistatic surface. Update the CPU baseboard using an
antistatic wrist strap attached to chassis ground. Observe static
precautions. Use an antistatic wrist strap.
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Note:
The option boards must be reinstalled in the same slots
when you reassemble the system.
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