I came back to a print that failed pretty nastily, so I stopped it/cleaned up the plate and thought nothing more of it. Later on I tried to heat up the printer again but after a minute or two the LCD died and wouldn’t turn on. I traced that problem down to a blown F3 resistor on the RAMBo and swapped it out with the F2 (which I believe just used for the motors) while I wait for more to be delivered - now it all powers on fine (with them swapped).
I noticed when I was looking at the heating-block that it looks like there’s PLA inside and to make things worse the hot-end/resistor is not heating up now . As far as I can see nowhere in the UK seems to sell the resistor - though tbh I’m not 100% sure what I’m looking.
So firstly - is there a chance that a failed print caused the heat-resistor to fail which in turn caused a fuse to blow on the RAMBo?
While I don’t have any local UK recommendations for replacements like this, we can help. Send a couple of pictures of the hot end with the following information in an email to Support@LulzBot.com:
Order number
3D printer serial number
Contact information
Shipping information
Additionally- the small fuses are for two things: board logic like you found, and for the stepper motors & hot end heater. More than likely once you replace the blown fuse with the one you’ve ordered it should heat up again.
If you have a multimeter you could test it - I found that fuse size was pretty tricky to find and only a few places stocked it in the UK. One thing (though someone please correct me if I’m wrong) - I don’t think is it possible for of these blown fuses to be affecting the hot-end without having other obvious symptoms?
What I saw when mine blew was: (F3 was blown) The printer wouldn’t power up/LCD wouldn’t turn on. When I swapped it with F2 (which I believe handles the motors) it would power up fine + the heated-bed working (I didn’t test the motors for obvious reasons).
So what I assume is if F3 blows everything seems dead, if F2 blows it shouldn’t affect the hot-end though if it does then the motors shouldn’t be working.
Well, no need for testing then, because EVERYTHING worked except for the heater not heating up. But anyway, I have another thread going where I explain the issue, pretty much 95% sure it’s the resistor, to back that up, I’m reading nothing across it for ohms also…
) that sells the heat-resistors? If not I’m tempted by something like (http://www.aliexpress.com/item/Heat-Resistor-4-7-Ohm-suit-for-Budaschnozzle-v2-3D-printer-sprinkler-head/1995934327.html) - might not be the best quality thing but it seems the most simplest and fastest way to get a replacement.