May 08, 2009 10:43 pm You'll have to check the manual or hit up Behringer tech support. I doubt anyone here is gong to know what the E2 error is.
If you bought it used you can get the manual in pdf form here. www.behringer.com/EN/Products/SL2442FX-PRO.aspx
Just scroll down the page and you'll see the link. I tried a google search on the error and found nothing. So the manual or tech support are going to be your best bet.