NON WORKING AC unit (Heywood OL10)

I've had the unit for nearly 20 yrs and it has been brilliant but when I got it out to set it up this year it's not working. No power when you plug it in and press the on switch. Someone with some electrical knowledge might be able to get it working as it's a great unit when it does work. Please note you will also need to get an exhaust pipe/tube for the back to expel the heat away from where you are cooling but I just used the ones you csn get for a tumble dryer. It is on wheels so is easy to move around BUT It is a HEAVY unit so you will need to be able to lift it into your vehicle as I cannot help I'm sorry. It will need a wipe down as it has been stored in a shed.