I have a JVC Home Theater System XV-THG30. At the moment, it works for a while and then cut-off. It seems as if it's a heat problem. When it cools after it is taken off, when switched on, it comes on normal and plays good until it gets hot again. At low volume it takes longer to cut-off than at loud volume setting.The installed cooling fan which acts as an extractor is working ok. I welcome suggestions to correct the problem.