Thanks everyone for the replies.
To answer a bit of everyone's questions.
When in use the room temp is about 75degrees. Not sure on the humidity but it should be low as used in an A/Ced room. When business is closed however the temperature can rise to possibly 85.
Most of the time the volume is "moderate".
I am not sure if this could have done it but I was showing video one night, running the HDMI through it, and the source volume was quite low so had to turn it up quite high. This is when it died. I figured maybe it overheated because I was able to use it about 20mins later. I then dropped the room temperature to about 65 and used it without any problems for the rest of the evening.
In the morning, I turned it on, it stayed on for a few secs, and that has been it since then.
What pro systems would everyone recommend? I want something that can hopefully handle HDMI as well for when I use the projector?
My knowledge is somewhat limited in regards to pro systems. I will only need about 500 watts.
Thanks again.
"ONLY" 500 Watts? You're kidding, right?
First, what speakers are you using, how many are connected and how are they connected? If you have more than two connected to each channel and they're wired parallel, that's your problem. If you crank the stereo, that's a problem, too. If the speakers are wired parallel AND you crank it, it was bound to happen.
Consumer electronics companies specifically state that, if the equipment is used in a commercial application, the warranty is void. They do this for a reason- they don't make the equipment for this kind of use. That said, there's a whole lot of consumer equipment in bars, restaurants, offices and industrial locations that has worked fine for a long time, so as TLS posted, "your mileage may vary". Heat, humidity, CIGARETTE SMOKE, placing things over the vents on the cover and shorted wires/bad speakers will kill a receiver very fast.
The first thing I would do is check the speakers and speaker wires for problems. If you don't find problems there, look at how it was used- if it was cranked to maximum, that's a problem and you clearly need more power. If the receiver has pre-amp outputs and everything BUT the amp works, you could always use the preamp and add a separate power amp. It would be best to disconnect the power supply from the internal power amp section if you do, though.
I don't like electronics being considered as disposable, but you could always buy something fairly cheap and replace it when it, too, dies. I see this as completely wasteful, but it's your decision.
Is this a commercial bar? Is smoking allowed? If so, I would move the electronics to a place where the smoke and humidity from the sinks/glass washer can't reach it.