Both of my ESL were working fine till 2 days ago but yesterday i found that both of them are not amplifying and sounding very bad. I removed the power chord and reinserted but there is no impact whether power chord is there or not there. The blue light shows when i insert the power chord but nothing happens to the sound. There was a thunder storm on Sunday night, is it possible that some power surge damaged it. What options do i have to fix it ?