Hi, my arcam alpha 7r turns on fine (orange light turns green) when you try and up the volume it clicks out and green goes back to orange, and the rear right hand side gets far too warm. thanks for any advice

You may have problems with one of your speakers,or with the wires that go to the speakers.
Try turning it on with no load, remove ALL the speaker wires and up the volume and see what it does.....If the amp does the same with the spakers removed ,it means that the amp is faulty,
if nothing goes wrong connect the speaker one by one until it fails and you will find out which speaker is faulty, Also check the impedance on the spakers to be the same asthe impedance recomended for that amp (If u connected two or more speakers per chanel have in mind that if u put them in parallel the impedance goes down two 8 ohms speakers equal one of 4 ohms)... ,you may be overloading the amp