Toyota Repair: 1994 TOYO 4 RN NO COMPRESSION, cam timing, timing belt

Question
1994 TOYOTA 4 RN WITH NO COMPRESSION, HAVE CHECKED TIMING BELT AND BASIC FUNCTIONS.  WHAT SHOULD I LOOK AT NEXT.

Answer
Is there no compression on any of the cylinders? What model is it, I'm not sure what a 4 RN is, is it a diesel engine? In most cases a sudden loss of compression in all the cylinders would indicate a cam timing problem, the belt may be intact but it could have jumped on the gears.