Furuno MU-150C - Manual (Page 22)

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5.2 Troubleshooting
The table below provides troubleshooting procedures to use when no picture appears. If
you cannot restore the picture, do not attempt to check inside the equipment – there are no
user serviceable parts inside. Refer any work to a qualified technician.
Troubleshooting table
Reason for no picture Remedy
Battery voltage too high. Check battery voltage.
Fuse has blown. Replace fuse.
Cable between MU-150C and external
equipment has loosened. Refasten cable.
Power cable has loosened. Refasten cable.