Pose,

Instead of trying to fix it yourself and possibly voiding the warranty, why not just take it back where you purchased it from and exchange it for one that works properly?

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)