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Hello,
Tonight after making a print, I was changing out nozzles (controller was one, and hot end cooling) when the LCD went powered down and all the led's one the Rambo turned off. There was no fan noise, not even coming from the 750 watt power supply. When I turned of the rocker switch, the cooling fan in the power supply powered up, but upon switching the rocker switch (on Rostock) to on position, the p/s's fan shut down. So I'm wondering if there is a short somewhere past the p/s on the Rambo? Is the Rambo fuse protected? Power supply is a Corsair CX750M with a few hundred hour on it.
Any suggestions where I can look for the problem?

Thanks,
Cris

3 fuses on rambo.


2 small , 1 big.


Test the small ones with multimeter.

Or swap them.


Forum has pics on how to solder a big standard fuse on yo the micro fuse if it is dead.

Teoman,
Thank you !! I took the p/s and Rambo out, found the small fuse behind the main power connector to be blown. Swapped little fuses, and unit powered up. Now to get a fuse. Wonder if SeeMeCnc stocks them. I'd like to find something locally that would work, not sure if I want to solder in such close quarters unless I solder leads to bad fuse and wire up an external unit like you mentioned.

Cris