preston

Hi everyone, I need some help .
I've just bought what seems like an early JPM Rollercoaster fruity. It's a £5 jackpot model with round buttons.
It was working ok for about 10 min and now refuses to "boot up" when plugged in.
I was playing it and went to collect a win but obviously there wasn't enough money in the hopper to pay out."contact engineer"
I filled the hoppers with a few pound and ten pence coins and it paid out and carried on ok.
It then seemed to suddenly go into "start up mode"(?) but before it finished this everything went blank (as though something had blown)
When plugged in you can hear a noise which seems like its receiving power and the red leds next to the reels are lit but thats it, nothing else happens.
Forgive my ignorance but any help would be much appreciated. Rollercoaster is my favourite machine and I was so looking forward to playing it I'm absolutely gutted.

preston