Repair PS Audio Trio A100?

PS Audio Trio A100 amp turns on but doesn't amplify a pair of Dynaudio Audience 72 speakers (4ohms). It can be repaired at a cost of $275.

Please recommend repair or an alternative power amp?

Thank you..
Have you contacted PS Audio for the repair? I had a Trio C100 that lost one channel and PS Audio fixed it for free. They said it was under warranty which surprised me as I was the second owner.
Good luck.