User`s guide

M3000A/M3046A/M3015A/M3016A Service Guide
Troubleshooting the Instrument 5-9
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The first two steps are to make sure that the paths AC power supply and battery to +5V
System Board supply voltages work correctly.
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• Remove the battery.
• Connect AC power. The AC Power LED should switch on within several seconds.
• Switch the Instrument on. The On-Off/Standby LED should switch on.
• If either the AC Power LED or the On-Off/Standby LED remain off, check if the Monitor
Bezel and display cables are connected properly to the System Board.
• Check the display cable is seated correctly (particularly if it is offset by one row too low–in
this case the +5V is shorted to ground and the Instrument remains off).
• If the AC power LED still remains off, check the AC power supply. (If necessary, replace
the fuses on the Power Supply board or replace the complete Power Supply).
• If the AC power LED still remains off and/or the Monitor still cannot be switched on, the
Monitor Bezel might be defective. Try a NQRZQJRRG Monitor Bezel.
• If the AC Power LED still remains off and/or the Monitor still cannot be switched on,
replace the System Board.
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• Connect AC power to the Monitor and make sure it can be switched on and operates prop-
erly.
• Make sure that the battery is adequately charged (press charge indicator on battery, at least
one green LED should switch on).
• Insert the battery into the Monitor (AC power still connected), the Battery LED should
switch on (green, yellow, or red).
• If the Battery LED remains off or is red, replace the battery with a NQRZQJRRG one.
• If the Battery LED still remains off, either the LED is defective or the battery control circuit
on the System Board is defective.
• To check whether the Battery LED is defective, disconnect AC power and switch on the
Monitor. If the Monitor works, most likely the Battery LED is defective. In this case,
replace the Monitor Bezel.
• To check whether the System Board is defective, disconnect AC power and switch on the
Monitor. If the Monitor remains off, either the battery fuse (surface mounted) on the Con-
Yellow Main CPU status LED—When on and blinking,
this LED indicates normal CPU operation.
Starts to blink 2 times per second after the red
Error LED switches off then slows down to blink
1 time per second after the red Error LED
switches off when the system boot has finished
(approximately 2 seconds).
If permanently on or off,
indicates a hung CPU.
Red Error LED—When on, this LED indicates an
error.
This LED switches on for about 1 second after a
System Board reset then switches off.
If permanently on, the Server
is probably defective.