Not getting a spark when I pull the trigger

This is my first time using this site. I have a problem with my plasma cutter. Its a cut50D plasma cutter. Was from China, that might be the problem but it was cheap. Visual inspection shows everything to be ok. I was cutting one day then I heard a small pop on the machine. After that pop, I tried cutting again and I dont get a spark. Everything sounds and seems to work perfectly but I dont get a spark... I mean, EVERYTHING sounds and works perfect. The light dont show that it has a problem, fans are on, air comes out. The coils inside the machine are all soldered on. I dont see any loose wires. i dont know what the problem is. Hopefully someone can help out because although this machine was cheaper than others, it was still expensive for me. Its practically new. Thanks.