Return x only if value in cell

Hi

I am running this formula, but it also returns x in the marked cell if the cells i24;i30 are blank.

Any suggestions on how to leave the marked cell blank if i24;i30 are blank.

Only if there is a number in one of cells i24;i30 should it return x in the marked cell, if all are blank the marked cell should also stay blank.

=IF(max(i24:i30)>=0;"x";"")