As we can see, a solid amber light has a couple of reasons:
Table 2 lists the front panel LEDs.
Component
Description
ALARM
Solid amber (noncritical alarm)
Solid red (critical alarm)
Off (no alarms)
STAT
Solid green (operating normally)
Solid amber
Device is starting up
Committing rescue configuration
Committing clear configuration
Solid red (error detected)
PWR
Solid green (receiving power)
Solid red (power failure)
Off (no power)
HA
Solid green (all HA links are available)
Solid amber (some HA links are unavailable)
Solid red (HA links are not functional)
Off (HA is disabled)
Link reference:
SRX300 Chassis | Juniper Networks