APC Back-UPS All LEDs Flashing: Internal Fault Meaning
On APC Back-UPS guidance, all LEDs flashing simultaneously signifies an internal UPS fault.
Multiple LEDsAll LEDs flashing simultaneouslyverified
Device category
Battery Backups Light Guide
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Important: Light colors are not universal. A blinking red light on one battery backups can mean something different on another brand or model.
Verified starter guides
APC Back-UPS Green On Line Flashing and Yellow On Battery Solid
On APC Back-UPS guidance, a flashing green On Line LED with a solid yellow On Battery LED means the UPS is performing a battery self-test.
Green and yellowGreen flashing with yellow solidverified
APC Back-UPS Red Overload Light: Meaning and Fix
On APC Back-UPS guidance, a solid red Overload LED means connected equipment is drawing more power than the UPS can provide.
RedSolidverified
APC Back-UPS Red Replace Battery Light: Meaning and Fix
On APC Back-UPS guidance, a solid red Replace Battery LED means the automatic diagnostic test determined the battery is near the end of its useful life.
RedSolidverified
APC Back-UPS Yellow On Battery Light: Meaning and Fix
On APC Back-UPS guidance, a solid yellow On Battery LED means the UPS is operating on battery power.
YellowSolidverified