Hi everyone.I've got strange errors with two of our AV776w DVRs.Our customer called us,that 8. camera's picture is too bright.All right,that's not a big deal,we've changed the lens of the camera.but the error stood still.We've changed the hole camera,but the picture is still too bright.We've adjusted the brightness with the software,but it was getting worse. Today i was shocked,that the camera is not recording any movement at all and another customer called us with same problem.So two DVRs with same error.What's wrong?I've made software and hardware reset too.Is that a serial problem with AV776W DVRs? I'd appreciate any help.