No Chime, no boot after update

I updated the open core patcher on my 2011 MacBook Air and when the system wanted to undergo the reboot it did no longer finish the “POST”, so there is no chime, the display stays dark and the fan starts spinning up quite to the max. Has anyone an idea what I can do to solve that? I already removed the battery and SSD but without any success.

submitted by /u/Deep_Border_5707
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