Having managed to source a TRS-80 Model III that I'm told hasn't been powered on for quite some time (and I suspect this is a massive understatement), I'm worried that the first thing that might happen when I apply power is that there will be a large flash and/or bang, followed by not much at all :-)
Although it is a specific machine, I'm happy if some answers are generic, so as to cover a wider audience (or is it visience when you're reading rather than listening?).
So my question is hopefully a simple one. Given its unknown condition, the high liklihood that it may not power up correctly, and my innate paranoia about destroying something I just bought, what should I check before I even plug in the power?