I had about four of these Computer SMPS lying around with me, couple of which was taken out of my PC from time to time. One or two might be from a ‘getting-rid-off’...

An American friend of mine approached me in church a while ago and asked me if I can take a look at his van fob key that was completely dead: I never worked on such keys before...

          This was brought to me with a complaint that it was not used for some time and when it was connected to Power Adapter, no LED light lit and nothing worked. I...