Sun Microsystems Fire V890 Service Manual page 151

9. If the motherboard is installed, disengage the I/O board from the motherboard by
rotating outward the two green ejection levers on the top of the I/O board.
10. Remove the I/O board from the system.
11. Place the I/O board on an antistatic mat.
12. If you are replacing the I/O board with a new one, remove the system ID PROM
module from the old I/O board.
See "How to Remove the System ID PROM" on page
Chapter 3 Servicing the Input/Output Board Side Components
112.
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