coddiewomple
commented
1 year ago if that where my printer i would be getting a multimeter out to monitor the voltage into the led strip to see if there might be a voltage problem and maybe disconnect the led strip to see if it restores full printer function. It is possible for those smd leds to go funny after they get warm (they can go short or close to it which would cause flickering and all sorts of drama i would imagine just like in a tv as it stresses the power supply) so sounds like you would be advised to contact elegoo support direct for that issue if it still happens with different firmware perhaps even stock fw then defo hw problem ether failing led or failing power supply or something else failing unlikely both but ofcourse always possibility another component is failing making power supply struggle.
Have you tried to diagnose it by switching things on one by one manually to see what might be causing the led's to go funny it could help to pinpoint what might be the trouble. So boot up and led's on then turn heatbed on and wait, then extruder on as well and wait then cooling fans on and wait then start driving the motors by using the position controls manually etc.
ramazandagli
The problem is when i started print led brightnes wobbling. I checked cables and gcode all looks fine. When printer doesn't print anything leds are stable not brightnes wobbling at all. Is it normal or not ? Thanks for helps.