Agilent Technologies Infiniium 80000 Series Service Manual page 91

Chapter 5: Troubleshooting
Motherboard Verification
Obtain a 300 Watt or greater ATX PC power
supply, or build a test fixture per instructions
Plug motherboard
connector of ATX
supply into
motherboard power
connector.
90
Motherboard Verification
Disconnect AC power.
Using
Yes ATX power
supply?
Plug AC power into power
supply being used.
Push power button on front of
instrument.
Do fans
turn on & does
motherboard beep
(@10 sec)?
Yes
Does operating
system boot?
Yes
Motherboard OK.
See Figure 5-13
Plug test fixture onto sense cable
No
of power harness.
Plug motherboard connector of
power harness into motherboard.
Go to
No A
No Replace motherboard
See Figure 5-14