User`s guide
M3000A/M3046A/M3015A/M3016A Service Guide
Troubleshooting the Instrument 5-7
• At power-on, the ECG OUT LED switches on for about 1 second then switches off.
• Every time the ECG_OUT communicates with the Server, the ECG OUT LED blinks
twice.
• Every time an error in the ECG_OUT communication to the Server is detected, the ECG
OUT LED switches on for 1-2 seconds.
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The green LED on the Display Adapter Board can be seen if the chassis is removed from the
plastic housing. It is located on the left side (speaker side) looking through the lower hole of
the metal display holder and can be seen below the brown flex cable which connects the
Display Adapter Board and the TFT panel. Its conditions are as follows:
• The Display Adapter Board LED switches on for approximately 3 seconds following a reset
of the System Board.
• If the Display Adapter Board LED does not switch on after a reset, this is an indication that
the flat ribbon cable to the Display Assembly is not seated correctly.
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The Wireless Assembly LEDs can be seen when the gray cover on the right side of the
monitor, above the link bar, is open.
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The Status LEDs are yellow directly after Power On, during initialization. During normal
operation they are green. If a problem occurs during operation the LEDs blink red in a
repeating pattern.
Radio
Sync
Link
Status
GYR
Y
Y
G
Open this cover to see LEDs
Service Connector J13