Blown power supply

Ok, this might be a weird issue, but here it goes. My power supply recently had a catastrophic failure (sparks everywhere, plastic burning smell, etc). This kind of sucks, but its still under warranty and all the other components of my pc seem to be working fine. The problem is, is that after attaching another power supply and running the pc for a minute or so, I notice the plastic burning smell again. I don't know if this is just residual, or if it is a sign of more extensive damage. If anyone has any input on this it would be greatly appreciated. I just need to know if its safe to continue to use my components without further damage.

What is the brand and model of the power supplies that you've used so far?

Please list your system specifications (i.e. CPU, graphics card(s), motherboard, hard disk drive(s), CD/DVD/Blu-ray drive(s), etc.)

It depends on how much of a burning smell you mean. Is it just like slightly hot wires, or like full on smoke? Some new psu's will have a slight smell for a tad bit, and then it goes away.