Allied Telesis x610 Series Layer 3 - Manual (Page 111)

x610 Series Layer 3 Gigabit Ethernet Switches Installation Guide
111
Switch Functions Intermittently
If a switch functions intermittently, check the system hardware status
through the management interface:
ˆ
Note the current voltage for the power supply compared to the
optimum rating.
ˆ
Verify that the system temperature is within the operating range.