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phillip.m6
(@phillip-m6)
New Member
PSU Squealing?

I just finished building my Prusa i3 Mk3 and was excited to finally turn it on and all it does is emit a squealing noise from the PSU. No fans, no LCD screen, no anything else, just a high pitched squeal. I saw someone else had a similar experience and discovered they had the wires connected wrong. I double checked and everything looks like it's wired up correctly.

Can anyone offer any tips or advice?

Posted : 10/07/2018 10:09 pm
phillip.m6
(@phillip-m6)
New Member
Topic starter answered:
Re: PSU Squealing?

For anyone else that finds there way here:

I was able to get it working the evening after I posted. I must’ve had a connection miss wired or loose. I connected the set closest to the frame only and turned it on and the display turned on.

That gave me the confidence to wire up the next set and turn it on again. Screen lit up again. Finally connected the bed wires and turned it on and all is now working.

It sounds like the squealing was most likely due to having the heatbed wired incorrectly but doing each set of wires one at a time seems to me to be the way to confirm that things are getting wired up correctly. 🙂

Posted : 13/07/2018 8:00 pm
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