Last week a thunderstorm rolled through while I was away for work and lightning struck my home and caused some damage to various electrical components in the home. My Marshall tube amp was plugged in to a wall socket. The amplifier will turn on but there is low volume and the drive channel won't switch off and there is no distortion either. Is this something where I can take it to a local Marshall retailer and have it shipped for repair or do I need to find a local repairman?
Thanks! 
Dennis