52 Chapter 2
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Figure 2-4 A7 Midplane Board - R867
5. While monitoring the voltage at R867, turn the instrument power on by
pressing the front panel On/Off button.
Does the voltage at R867 measure 0 VDC?
If yes:
Proceed to step 6.
If no:
After verifying that the connections from the front panel On/Off button
back to the A4 CPU board are not at fault, replace the A3 CPU board.
6. Do all of the green power supply LEDs along the top of the A6 Midplane board
come on?
If yes:
After verifying that the connections from the front panel On/Off button
back to the A3 CPU board are not at fault, replace the A3 CPU board.
If no:
Replace the A5 Power Supply assembly.
NOTE Before replacing the power supply, verify the midplane and motherboard
interconnects are mechanically secure.
A9, L.O. Board
plugs into J21
A5, Power Supply plugs
into J101 and J102
A3, CPU Assembly plugs into
J201, J202, J203 and J204
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