I was on the laptop everything was great all of a sudden it went off and there's no signal anymore what is going on and is it broken?
Charging the battery would be an option.
Battery empty?
Power supply defective?
Broken laptop?
Remote diagnosis is impossible
Did it happen in mains operation or in battery operation?
If the latter: connect the power supply.
Otherwise take out the battery (if possible) (with the power pack disconnected), press the start button and wait a while. Then insert the battery again, connect the power supply unit if necessary and try to start.
Dude what should we answer now?
"PC has run out, what's broken?" Then I can just ask you "The car has gone out, tell me what's broken"
Nobody will be able to help you without details or information.