I own a custom Prusa-like 3D printer. I have printed a lot over the last year. Yesterday I started having problems with the print stopping after a few layers. I noticed that at this point there is no power. Starting from a cold printer, I noticed that the LED light strips I have installed starts to flicker as soon as I turn on the heated bed. I print ABS using an extruder temperature of 245°C and a heated bed temperature of 90°C. I am suspecting the power supply but I am not sure if it’s the power supply in itself or something on the printer motherboard (or the heated bed) that is causing the power supply to shut down. At one point yesterday I smelled burning plastic (typical of burning electronics) but I could not trace down the source of the smell.
Any ideas where to start? Thanks!