Reply: iMac A1311 Please Help!

Hello, Love your site, very nice design.

I'm having a problem with an iMac a1311 2428 i5.
I used a raspberry pi 3 to do the dumps but since i wrote firmware, the mac won't boot anymore. The fans spin for a second then off, repeat. I have tried flashing both modified and original with same result. It posted fine before
Any tips or advice would be much appreciated! Thanks.

Edit: I followed the guide here