Can you smell burning? If yes one of the capacitors may have blown.
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Can you smell burning? If yes one of the capacitors may have blown. On mine I turned it on it's back and open the catch. Then undo the two screws holding a metal plate and you should then be able to open it further and move the plastic cover out of the way. You should then see the circuit and possibly a blown capacitor. If it is that you can just replace the capacitor. Hope that helps.