Can anyone suggest what's wrong with my power supply?
I have a Maplins N93CX Switching Mode Power Supply
. It has worked fine for the last 5 months or so, but just under a week ago I shorted the terminals, and normally because of all it's current limiting and stuff is absolutely fine with this but this time it just suddenly shut down, blew the the fuse internally and the one in the plug. GRRR. I seem to have located the fault on the mains side as with a dim bulb tester the bulb will instantly light with it switched on.
Another thing I have noticed which I find very
weird is that if I measure the resistance across the live and neutral mains in it will at first measure just under 1 Megaohm, however if I short the terminals then measure the resistance will go down to 500kohms!
I should be able to post a picture of internals if anyone needs.