What he can do for you right now is ship the PCBs assembled excluding the chips DUE TO YOUR INABILITY TO PROVIDE SAID CHIPS and keep all the money. Is that going to make you happier than getting 50% of your money back? I believe he wouldn't mind at all to do that.
How is it burnin's fault that you didn't keep your part of the deal?
Hey I didn't pre-order any boards. I'm just saying there's some entrepeneural risk involved at burnins side as well.