Puzzling problem with 2nd floor lights

[darkgray]

Here is my case:
Step 1: Isolated yesterday 2nd floor lighting from main switchboard to remove from mirror light the shaver socket transformer which blew 2 Saturdays ago (2nd floor lighting switchboard switch did trip at the time).
2nd floor lights comprise: 1. main bedroom group A spot lights, 2. main bedroom group B spot lights, 3. staircase landing spot light, 4. Attic light, 5. en-suite spot lights, 6. en-suite mirror light.
Step 2: Carried out the corrective work.
Step 3: Restored power to 2nd floor lights from main switchboard.

PROBLEM: staircase landing spot light and attic light no longer work (mirror light works). Have followed similar actions in the past but never had this kind of problem. Could it be that when the transformer blew, high current may have caused defects in the circuit that only now have manifested themselves? (absolutely all 2nd floor lights were working last week).

How can I check/test were the problem is?

Thanks and best regards

 

[johnny_t]

If you want my guess, the two lights you have mentioned are the last two on the lighting circuit (the mirror light being third from last) and you have inadvertently disconnected either (or both of) the permanent live or neutral from them.

 

[darkgray]

thank you johnny_t

Well, I only disconnected the parallel branch within the mirror light that goes to the transformer (that was the intention at least). And also, there are only two wires feeding the mirror light from the wall, live and neutral (red/black). Is it still possible that the last two in the circuit have been disconnected ?

 

[johnny_t]

If you've just disconnected something internal within the mirror light unit, then my guess is unlikely to be correct - Sorry.