CISCO leds on, dont boot up

[deryabehcet]

Hello. I have a problem with my cisco 2960 switch dont boot up. When i want to connect to the switch its impossible. All leds is on and dont blink. When i want to connect with mini usb console my pc doesnt receognize com port.

[Dennis Mink]

are you able to console into a working switch with the same console cable and client?

if so, then maybe RMA your switch, sorry