My toshiba a60 laptop as just turned off and wont come back on its gone dead no lights or noise?

My toshiba a60 laptop as just turned off and wont come back on its gone dead no lights or noise any help apreciated ive tried taking battery out and charger and putting them back in.no luck it was running on mains when it went off.theres no reset button either
Answer
Hope its insured coz its gonna cost a hell of a lot to repair. my laptop did that and i found out it was due to overheating. luckily i had insurance!! could also be your battery. laptop batteries dont last long. or you might need a new charger.