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If the Unit does not turn-on, and / or the power indicator LED is NOT
illuminated, do this:
1) Check and make sure that B+ and GND are not reversed
2) Check that all power wires are properly connected and has
the appropriate potential (11- 16 volts)
3) Check that the fuse is intact.
If you experience high audible distortion or low output volume:
4) Check that the input and output levels are set correctly. Input should
match the source and output should match the sensitivity of the next
in-line component.
If you experience whining or engine noises:
5) Verify that the GND connection is secure, the conductor (wire) is not too
thin and unnecessarily long.
6) Check that the B+ wire is not too thin and unnecessarily long.
7) Change the power source; try taking power from a different point.
Trouble Shooting Guide