I'm looking for a replacement of the 18t10agh or ap18t10agh-hf and in my country (Venezuela) is impossible to locate, I bought one on ebay just these https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/183229757532 and I gave them to a technician for my house and he tells me that it works but does not turn on the monitor lamps (something like that is called) I guess I are not original mosfet.

(Sorry I use a google Translate)

 

It may be a fake MOSFET from China. However, it may also be that whatever blew the original MOSFET, also blew/destroyed some other components in the circuit. You have to look around the area of that MOSFET to see if something else has been destroyed.