I have a six gang extension cable that has been working well. This morning my tv would not turn and the light next to the socket it was plugged in to was not lit. I plugged it into another socket on the same lead and it turned on.
Should I be worried? Is there anything I can do to repair the extension lead? Should I buy a new lead?
These days something, probably the EU, has decreed that these things aren't openable to fix. In a sane world you could check the inside. In our present world you may wish to consider buying a replacement as you have no idea what the cause of the problem is.