Failing Apple 143W Power Adapter.

I have been struggling with an iMac 24" for over a year. It shuts off randomly from three to ten times every day. Removing the magnetic plug and replugging it allows the machine to reboot. Yesterday I found a new iMac 24". We switched the power adapters and cables and the new iMac failed while mine kept working, indicating that my iMac is OK and the power adapter and cables are the problem. Has anyone else had this problem since the last post on February, 28, 2024?