[quote user="vanman"]what do you think I need to replace?[/quote]
Not a clue, really. I assume the "thing that stores power" may have been a capacitor, and you may have replaced it with one of the wrong value, or caused some other problem while attempting the repair.
But the burning smell sounds pretty terminal for some component, and there's a chance you may have damaged some circuitry - if you're lucky - or the plasma panel itself, if you're unlucky.
[quote user="vanman"]I have replaced the fuse with a higher rated one but still nothing[/quote]
Such a bad idea - the fuse is there for a purpose, not least of which is to blow before the TV catches fire and burns your house down.
[quote user="vanman"]I know nothing about tv's so please explain what the part looks like and what it does[/quote]
As I said, not a clue without inspecting and testing the TV thoroughly.
I think at this moment an embarrassed call to Pioneer customer support in search of the details of your local service centre is your best bet.- 0870 600 1539, or you can download a list of service centres
here. Look for the ones with 'PDP' in column 1.
But get a quote: chances are this ain't going to be cheap, and it won't be covered by the warranty, even if the TV is new enough to be under guarantee.