NEC APC Smart-UPS 1400 (050-01803-000) UPS System "red light flashes circuit breaker" Questions

red led on the back flashes once. Did anybody find this fix ? befor I really get deap into trubbleshooting it. Thanks Brian Batteries in the UPS typically last 3 to 5 years and it depends upon several

Red circuit breaker button is pushed in: Never was activated or pushed out. Press the "ON" button,the light sometimes instaneously flashes, goes out,-----and nothing. The computer screen icons are all