If/then To Make Cell Blank

I am using a “borrowed” formula from a coworker that I do not really understand however it is working for me, sort of.

=+IF(ISERROR(FIND("F",UPPER(CONCATENATE($V17,$W17,$X17,$Y17,$Z17,$AB17,$AC17,$AD17,$AO17,$AZ17)))),I F(LEFT(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(UPPER($R$2),"NA",""),"FAIL",""),"PASS",""),4)="FFFFFFFFFFFFF FFFFF","FAIL","PASS"),"FAIL *")

What this does is read the range of cells and immediately fails a quality check if it is in a critical cell, or fails if multiple non critical items fail.

I want to use an if/then to make cell blank if there is no data in one particular cell (which means no quality inspection performed). Here is what I tried:

IF(V18="","",+IF(ISERROR(FIND("F",UPPER(CONCATENATE($V18,$W18,$X18,$Y18,$Z18,$AB18,$AC18,$AD18,$AO18 ,$AZ18)))),IF(LEFT(SUBSTITUTE(SUBSTITUTE(SUBSTITUTE(UPPER($R$2),"NA",""),"FAIL",""),"PASS",""),4)="F FFFFFFFFFFFFFFFFF","FAIL","PASS"),"FAIL *"))

The leaving the cell blank part of the formula works however it allows the remainder of the formula to only work if “fail” appears in the first cell it reads (in this case V18). If the “fail” appears in any of the other critical cells, it does not work at all.

Also as a side project not sure what the substituting to $R$2 does so if anyone knows how to clean this up, let me know.