Hi all!
A couple of days ago I had some problems with my power supply (PS). The PS was disconnected for a couple of hours, when I reconnected it, the blue led did not turn on. After disconnecting and reconnecting a couple of times it went on again. The PS stayed connected for a couple of days.
Yesterday, I tried to start the print but the heatbed did not manage to raise the temperature (display reported the "ambient temp" of about 20°C). I tried to manually increase temperatures via the advanced maintainance, the noozle heated up but not the bed (perhaps 1-4°C, but not sure).
I tried to turn the printer off and on again, no changes. When I disconnected the PS and reconnected it a couple of minutes later, and tried to turn the printer on, it went on for about a second and went of. The blue led of the PS went to half (or less) of its normal brightness. Since then the PS seams to be dead.
In the past few months, the PS made some hissing noise (which is frequent on switching power supplies) especially on load (heating the bed).
I submitted a ticket, but I hope to get some information sooner (as it seems that the support is a little behind schedule).
I suppose it is just a dead PS, but before replacing it, I would like to get shure that there is no short somewhere that would kill a new one...
What should I check ? I suppose the cable for the heatbed, the headbed itself (resistance). Anything else?
(I have some skills in electronics, but prefer to get some information before disassembling anything)