Just send it back for RMA, dont tell them its lightning strike that caused it.

THEY WONT FIND OUT, lightning strike damages are almost impossible to deduce.

I have one Dell mobo and 1 dell CPU damaged by lightning strike, I just called them and told them that they died for no apparent reason.

They took the components and replaced them with new ones, just like that.

UNLESS there are huge burning marks on the components or very visible physical damages.