It's amazing how many problems, which initially seem serious, come down to something really simple.
Not so long ago, my sister (who lives five minutes away) phoned me at 1.30 in the morning, panic stricken, because she had turned on her PC and it was "making funny noises". Screwdriver in hand, I walked round to her house expecting to find that a card or memory chip had come out of its slot, only to discover that the "funny noises" were the result of a pile of freshly ironed clothes lying on top of the keyboard!