It always seems to be the Capacitors. There will be full instructions on Forems , there are lots of them on tinternet. All you need to know and fairly easy DIY even if you were made to take O level knitting instead of something useful. Just enter the model and make on Google.
Otherwise take it to the boys at, I think 64 Warren Road Woodingdean. It won't be cheap.
same happened to mine, they are fitted with 10v caps.
i went to maplins in london road, bought 4 25v ones and replaced them myself. they cost me 93p each.
just whack the back off and you'll see bulges on the top of the caps that have blown,
there is a larger cap that you need to discharge to earth before touching anything cos that will give you a nasty bite if you touch it