[Elecraft] K3 Fuse Blowing on Power Supply

[Bill Gillenwater]

Current setup.
K3 with P3 early serial. Back to factory for complete update. Gold Pins etc.
Today K3 shut down.
Found blown 15 amp fuse in ground side of power supply cable
Power supply is MFJ 4035MW.
Have had no previous problems with this setup.
Occasionally there was a message on the K3 saying LOW VOLTAGE.

Thanks for ideas and assistance.

73 Bill K3SV