Okay, thank you for your quick response but I think your model number is XXXXX
PEB1590SM1SS. Now for that model the part # XXXXX the control board WB27X10791 and runs $230. Now I am sending you a link to your microwave. This will show you all the parts to your unit. Hope this helps and good luck.
I am sending you a link to the owners manual. The warranty is on page 31 of the manual. The way it looks unfortunately the board is only covered a year but if I were you I would call GE and raise cain and see if they give in since it is only 2 years old. They might just give in. Here is the link to the owners manual and good luck.