-Previous(old) PSU keeps blowing kettle plug fuse but doesn't trip. PC not working.
-With new PSU PC working normally but RCCB trips randomly.
-A work PC , MS Office , light browsing only.
-Tried different socket , same.
-Reassembled PC twice to check any loose cable /screws stuck between motherboard.
Now testing with all PCIE/PCI cards removed.
What should I do next?