PreSonus RC 500 - Manual (Page 20)

4.4 Troubleshooting
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4.4 Troubleshooting
No power.
First make sure your unit is plugged in. If it’s connected to a power conditioner,
verify that the power conditioner is turned on and functioning properly. Check
the fuse on the back panel of the RC 500. (Be sure to disconnect the power from
the RC 500 before opening the fuse housing.) A blown fuse may look black on the
inside, or the wire inside might appear broken, and a very black fuse indicates that
something may have shorted out. Try replacing the fuse with a new one. Please
refer to the information on the rear panel of your RC 500 to select the correct fuse.
If the fuse blows again, please contact PreSonus to get your RC 500 repaired.
Not passing audio.
If the RC 500 appears to power on but it’s not passing signal (the lights are on but
nobody’s home), first check all the cables connected to your RC 500 and make sure
that they are working correctly. Also, verify that the Source Select switch is set to the
correct input and that the Gain and Output Level controls are set to provide enough
amplitude for the signal. If you have your RC 500 connected to a patch bay, try
connecting a source directly to the RC 500 to rule out a problem with the patch bay.