Juniper Networks M7I - Manual (Page 64)

OK LED, one tricolor:
• Off—PIC is offline and it is safe to remove it from the router.
• Green—PIC is operating normally.
• Yellow—PIC is initializing.
• Red—PIC has an error or failure.
APP LED, one bicolor:
• Off—Monitoring application is not running.
• Green—Monitoring application is running under acceptable load.
One tricolor per port:
• Off—Not enabled
• Green—Online with no alarms or failures
• Yellow—Online with alarms for remote failures
• Red—Active with a local alarm; router has detected a failure
LEDs
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M7i Multiservice Edge Router PIC Guide