Need Multimeter Question Help

Hi everyone,

I’m severely trying to figure out where on the circuit board do I put my multimeter pins on, in order to figure out whats wrong with a cell phone?

Do I put my multimeter on different parts of the cell phone circuit board to diagnois different issues?

If so? Where?

This has got me so confused.

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

crwdns2934109:0crwdne2934109:0

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