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Motherboard Installation
NTM6900 / WTM7026 Technical Reference
Power Status LEDs
The five power status LEDs on the motherboard indicate that the proper voltage levels are being delivered
to the motherboard. The conditions of the LEDS must be observed before installing or removing option
cards and system components. These devices should
never
be installed or removed while LED54 is
illuminated. LED54 indicated that the 5V Standby voltage is present on the motherboard. Pulling the
incoming AC power to the system power supply is usually required to turn off the 5V Standby voltage.
The table and drawing below indicated the function and location of each power status LED.
LED Number
LED Function
LED52
3.3V Level
– When turned ON this LED indicates that +3.3V is in the proper range for
the motherboard.
LED53
12V Level
- When turned ON this LED indicates that +12V is in the proper range for
the motherboard.
LED54
5V Standby
- When turned ON this LED indicates that the 5V stand by voltage is
present on the motherboard. Removing or installing system cards and device while
LED 54 is illuminated may result in damage to the motherboard and/or the system
device.
LED55
5V Level
- When turned ON this LED indicates that +5V is in the proper range for the
motherboard.
LED58
Power Good
- When turned ON this LED indicates that each system power level is
within the proper operating range for the motherboard.
TRENTON
Technology
Inc.
3-16
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