anybody know?

[LEXUSMAN83]

okay i installed an eclipse double din nav unit in my 2000 lexus gs400 with the pioneer oem amp system. unit powers up and everything like it should but i have no sound. i bypassed the oem amp and ran the speaker wires from the amp straight to the headunit but no sound. i have power coming out of the radio to the speakers and power at the speakers but no sound. any ideas, think maybe the unit is bad:crap: it is brand new. i know all my connections are right per alldata diagram

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