Hi I have a friends sansui 9090db at my house that needs some work on it I hope it might be an easy fix. The auto protection just keeps flashing red and wont turn green. I checked all the fuses that I could find including a couple underneith the bottom cover of the unit all the fuses are good. I cleaned all the pots with deoxit while I had the unit apart still no luck. ANY ideas that will fix this problem? If I cant fix it I am sure it will most likly go back on his basement self were its been sitting for a few years what a shame. All the lights lit up on the faceplate which can be a problem on a sansui 9090db, unit itself is about a 7 out of 10. Thanks all.