This laptop wont turn on. The power supply is OK. what could be the problem?

Hi guys, I recently found out that there is oil when I peep down the hole thingy that has the spark plugs in. There is...

Get a multimeter. Check that the fuse is OK. If it is ok, open the cover at the back of the iron. Plug in the iron. Be careful not to get electrocuted. Check that the cables from the socket on the wall have power. place the leads of the multimeter on the live and neutral and check for 240V or 110v depending on your country. If no power here cable could have a problem. If there is power here, turn of power and unplug socket. open top cover, you will see the heating element. Check for continuity between the ends of the element, If no continuity the element is dead and you need to buy a new iron. If it has continuity then check continuity of other components connected in series with the element. Some models a limit thermostat to prevent the iron from over heating. This looks like a small resistor about one centimeter long, if it has no continuity, cut it off and bypass it. It is a safety device that fails when it senses high temperatures in case the main control thermostat fails. If you can find a replacement...