Audio Systems: no sound/no tune/clock ok, auto reverse cassette player, band equalizer

Question
Sparkomatic SR430 AM Stereo/FM Stereo with 5 Band Equalizer and Auto Reverse Cassette Player.Installed in bus conversion RV.Roof top antenna may have taken lighting hit.Don't know for sure because didn't try radio for several months.No sound,no cassette audio,no tuner function,clock ok,all fuses ok,all circuit boards/components look ok,when turned on speakers make initial "thud",don't remember if there is any volume proportioal hiss(probably not)Do many repairs(not radios)-unable to find any source for schematic.Any help/suggestions appreciated.Willing to call you if you think problem is too difficult for email. Thanks,                                            Ed

Answer
Ed,
please give me all the numbers on the stickers and other locations on this stereo. With certain numbers I can tell who actually built the stereo and I can see if I have service data for your stereo. As for the stereo, it sounds like a common power problem that is effecting both the cassette and the tuner section. If you would like, please feel free to contact me direct for a one on one chat!.

TOM,
T&D ELECTRONICS
tdeser@zoominternet.net