Power Adaptor Problem for mac mini.

mac mini a1283 is not powering when switching ON. how do i test the output voltages for the power adaptor for my mac mini.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0