My Black and Decker Electromate 250 power pack had its 110 volt AC output accitentially left on while charing. The AC output now will not turn on even though the battery is fully charged. I assume the inverter is damaged and that it is ot economically practical to hire a repair. I would like to attempt a repair myself, but am unable to find repair or parts information. Can you help? S Masters smast53076*aol.com