yeah sorry crossedover! only just thought about it tbh, i just thought it was a connection problem but obviously its not, my old man is bringing his expensive multimeter tommorow, can you advise me how to read the input and output?
It sounds from what you say now, you almost certainly have shorted output transistors on the channel that went"fuzzy".
I'm going to advise you not to muck about inside that unit. You obviously have no experience in service work.
I have a real problem on a forum like this advising people such as yourself to probe around where there are high voltages. I think that is frankly irresponsible.
In any event you won't learn much as you will read low voltages anyway, whether the the power supply is OK or not. The reason is that if an output stage has failed transistors, the current limiters come into play and as a consequence the voltage drops drastically to help prevent cascading damage.
So you have to start isolating parts of the unit before checking the power supply. In view of what you said that amp needs checking and isolating before any power supply checks are done. It takes experience to tell the "chicken form the egg," in these circumstances.
Your options are to have a qualified service tech look at it or send it to the recycling center.
People always say get an estimate, but this is unfair, as the longest part of these jobs by far is isolating the problem. A receiver is complex and that can take many hours. The easiest part is always the actual repair. Unfortunately because of the hours involved it is usually more cost effective to recycle and replace.