Hi all!!

Hi.
i have Dell Latitude 5540
ST: 3WN7JS3
The problem is the laptop is do not turn on - one long white blink near power cable connector after 5 seconds when connecting to ac adapter
Laptop do not have internal battery.
i think Bios issue.
I tried to flash clean bios + me from this topic. And laptop work in manufacturing mode i can install windows and all works fine(first boot F2, write service tag, disable Absolute, reboot)
But if I disable manufacturing mode the laptop after first reboot do not turn on(one blynk and power consume abot 1-1.5w, any other...