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E.g, How can I fix my Philshave Smartshave XL) ?

My Philishave smartshave XL is showing a lock and key on the display. How can I unlock it?
Arthur, August 2008
I have now found the answer: - Press and hold the 'Power On' button for about 30 seconds. The key symbol will turn over and the shaver will start. To lock it again press and hold the 'Power On' button for about 30 seconds when the shaver is running. The shaver will stop and the lock and key symbol will reappear.

ArthurB, August 2008