the amp has been inoperable for about a year now.

My wife is starting to bug me about getting it fixed so the towers speakers (Exile SXT something) will work again while she surfs .

Head unit works fine, 6 cabin speakers on a JL amp work fine, but the Harpoon amp is telling me it is protect mode.

I even forget how the amp is telling me this - light or something on the face.

How do I go about trouble shooting the cause?