Hi
It is very possible that the PSU caused a power surge unfortunately
When power supply’s fail they can take lots of things down with them like the logic board and screen…
If you can take the logic board out and look for any burn marks or discolouration ,that will help indicate if the logic board will need replaced or repaired
Here’s the guide for getting it out
[guide|30529|new_window=true]
If you are unsure of any things you can use this guide to upload some photos so we can help you with it
[guide|21499|new_window=true]
Hopefully this helps
Any questions please ask
Thanks:-)