Big Box won't power on

Discussion in 'Calibration, Help, and Troubleshooting' started by Dano Wall, Jul 7, 2016.

  1. Dano Wall

    Dano Wall Member

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    HELP!
    I was a Kickstarter backer (Backer #373) and I've been loving my printer since it arrived.

    Sadly, when I tried to turn it on yesterday, I discovered it unresponsive. No matter how I try to power it on it remains cold, dead. Nothing odd happened last time I ran it, noticed nothing odd when I shut it down.

    I've checked the power cable and confirmed there's no debris inside that might be shorting something on the motherboard. I'm at a loss as to what happened that would cause it to suddenly not power on.

    Can you help me get this printer turned on again? Any advice you can give would be most appreciated.
     
  2. Ephemeris

    Ephemeris Well-Known Member

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    First thing is determine if the fuse inside the IEC connector is blown. Unplug your line-power cord, then pop open the little plastic cover next to where the cord plugs into the back of the BigBox and check the fuse. Ideally with an ohm-meter but visually might work.
     
  3. Old_Tafr

    Old_Tafr Well-Known Member

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    Assuming it isn't the fuse then check step by step.

    If there are no signs of life at all, no red light from inside on the Pi? No front panel display? no lights on the Rumba?

    Then check you can power something else from the mains socket.

    If that works and the fuse is ok then...

    Check the 24v supply on the bottom right of the Rumba (red and black wires) where the power supply provides the Rumba's power.
    It would be strange but not impossible that there is power to the Rumba but it does not have any lights on at all.

    If the 24v isn't there then either there isn't mains power to the power supply OR the power supply has failed.

    As you are a Kickstarter I assume you built the printer so now it's a open the bottom of the printer and check the wiring from the switch to the power supply for bad connections, loose connections etc.

    If you have mains power (Get someone competent if you are in any way unsure about checking this) but no power on the 24v lines out of the power supply then it's the power supply or something upsetting it.

    If there is mains power into the supply you could check it by removing all load from the power supply BUT depending on the type of supply it may not like operating without a load. Check with e3d before doing this as the consequence is blowing it up.
     
  4. Dano Wall

    Dano Wall Member

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    @Ephermeris It looks like you were right about the fuse. fell apart when I took it out, blackened glass. I even had a multimeter ready to check it, but there was no need as it was in parts.

    What type of fuse is this? Is there an easy way to tell? Where can I find more?

    Thank you all for the speedy advice!
     

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  5. mike01hu

    mike01hu Well-Known Member

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    That looks like it was a poor fuse rather than a failure of the BigBox. The fuse rating is on the endcap and they are available from the likes of Amazon or your local electrical hardware store.
     

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