|Try this trick which has been known to help at odd times:|
Turn off computer and disconnect from domestic power. Seems like it is not a laptop but if it is then remove the main battery too. Finally hold the Power Off/On button for at least 20 seconds to discharge the motherboard components. You might just be lucky.
Otherwise there are many possibilities, the Power Supply Unit being high on the list.
Always pop back and let us know the outcome - thanks
message edited by Derek