Sorry missed the link
First things first......REMOVE the mains PLUG.
Could you check the continuity on the fuse F1 on the small green board marked as 50 12?
Is it possible to remove the PS board and check the back side for any signs of damage due to the blast you heard?
To test the fuse, put the multi meter on the beeper mode and touch the lead ends together.......you should hear a beep sound when the leads are touched together.
Then , put the probe ends , red and black , to the 2 ends of the F1 (where the sine wave like symbol is shown).....if your fuse is good , then you should hear a beep sound.