Just been watching Lord of the Rings in DTS (vol level -21db) and my amp switched off automatically during a loud sequence. When I switch it back on, sparks appear, a loud fizz and the amp switches off. I cannot beleive it! I only bought this amp in January, so it should be still under guarantee, plus because it's from Richer Sounds I have an extended warranty. However, I cannot find the receipt (its somewhere but may take ages to find). Has anyone experienced this before on this, or any amp?