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Step 1520-3
1. Turn the power off.
2. Unplug the system unit power cable from the electrical outlet.
3. Remove external cables (keyboard, mouse, etc.)
4. Remove the top cover.
5. Record the slot numbers of all the installed adapters. Label and record the
location of any cables attached to the adapters. Remove all the adapters.
6. Remove all the memory modules.
7. Remove the processor cards (Model 240 only).
8. Remove the L2 cache card (Model 140 only).
9. Remove the riser card and SCSI cables from the system board.
10. Unplug the diskette drive signal cable and diskette drive power cable from the
system board.
11. Unplug the power cables from all the SCSI devices.
12. Unplug internal serial port and Ethernet cable from the system board.
13. Unplug the front fans and media fan.
14. Unplug the speaker.
Note: Do not disconnect the power-on LED or the power switch.
15. Connect the system unit power cable to the electrical outlet.
16. Turn the power on.
Does the fan in the power supply turn on and the power LED come on and stay
on?
NO Go to “Step 1520-4” on page 2-18.
YES Go to “Step 1520-5” on page 2-19.
Chapter 2. Maintenance Analysis Procedures (MAPs) 2-17