User`s guide

M3000A/M3046A/M3015A/M3016A Service Guide
5-10 Troubleshooting the Instrument
nector Board is blown or the System Board is defective. If necessary, replace the Connector
Board.
• If the Monitor still remains off, the battery control circuit on the System Board is defective.
(Replace the System Board).
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The following steps are to ensure that the Monitor finishes its first boot phase and the
application software starts running. The application software is running when the yellow
LED blinks slowly (1 time per second).
For these steps it is assumed that the Monitor is powered correctly and the +5V System Board
supply voltage is okay. This is indicated by the On-Off/Standby LED and the green LED on
the Main Board (upper left) both on.
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The Monitor Bezel LEDs, tone and display come up as follows:
• The AC Power LED is on.
• When the On-Off/Standby switch is pressed, the On-Off/Standby LED switches on imme-
diately.
• The Alarm LED and the Suspend LED both switch on red and the Battery LED switches on
yellow. After 1 second, the Alarm LED switches to yellow, after 1 second all three switch
off.
• At the same time as the LEDs switch off, the speaker is tested with an audible tone.
• Shortly after the LEDs switch off, the display backlight switches on and the M3/M4 logo
displays.
The Three LEDs on the System Board come up as follows:
• Green LED—When the On-Off/Standby switches pressed, the green LED switches on
immediately.
• Yellow LED—The yellow LED blinks 2 times per second after the red Error LED switches
off then slows down to blink 1 time per second when the first system boot phase finishes
(after approximately 2 seconds).
• Red LED—The red LED switches on for about 1 second after a power on (RESET) of the
System Board then switches off.
If the boot process is not successful for any reason, check for obvious problems (Part 1
Troubleshooting Checklists).
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If the three LEDs on the System Board indicate that the first boot phase has finished
(green=on, red=off, yellow=blinking once per second) but the display remains dark, check
the following:
• Check that the display cable is seated correctly.
• Check (in the Display Assembly) that the video flex layer is snapped correctly onto the con-
nectors on the Display Adapter Board and check the TFT panel by pressing onto the flex
layer at the connectors.