High pitch noise when powered on

When dreamGEAR Quad Dock Pro is powered on

high pitch noise can be heard from the dock.

Sounds like a capacitor is bad. Which of capacitors has the highest probabilty of being the culprit?

Mikael

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

crwdns2934109:0crwdne2934109:0

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