Hi, recently my Samsung 2493HM failed to switch on, the blue power led keeps blinking fast and faintly. Measurements indicate that 5V Standby line is stable until the PSU gets the turn on signal, all lines become unstable at that point and begin oscillating at regular intervals, dropping voltage pretty much to zero then recovering (including the 5V standby line as well that was stable before turning the PSU fully on). All caps are fresh, nasty chloroprene glue removed everywhere, main components checked (mosfets, diodes, big cap, other caps). The voltage of the main cap is about 320V at all times.
This happens even without any load connected to the PSU.
Any wild guess about going forward? Don't wanna make a mess with the 320V hanging around...
Included a PDF schematic in attachment. Cheers!
This happens even without any load connected to the PSU.
Any wild guess about going forward? Don't wanna make a mess with the 320V hanging around...
Included a PDF schematic in attachment. Cheers!
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