Geeetech

i am using printer about 2 months. there were no problem until yeterday. i started to print then went away. when i get back i see the printer stopped at half. when i open the power button the red light on but nothing works. when i turn the motors with hand, the lcd light on. so i think the switch burned. what must i do? i have a lot of work i must fix it as soon as possible please help

Even without power, the lcd light will on if you move the motor with hand.
How is it after you turn off and turn on the printer again? Is the fan working? Is everything functional?

i changed the power supply. i put 12 v 30 a power supply. the problem fixed.

after that i took off extruder and cleared. i hanged it again i started the printer. when the extruder were warming up, i saw white smoke both of extruders. then gt2560 gone at this time. lcd and fans doesn't work. the green led is on at gt2560 switch and there is 12 v. but other things doesn't work. what must i do? how many volts must on Mofests?

To faster know your issue, and help you try to solve the problem yourself, please take a video and decribe the issue. You can upload the video to Youtube first.

you aren't good helper. i changed the 5a fuse, all functions are working except fans. no volts on fan outputs. i think a capacitor may burst. but i couldn't find yet. do you have an idea?

Sorry, my bad.
Please connect the 2 sides of D17 together, as shown in th picture:

d17 really bursted. i can't read the text on d17. so i changed it with 4148 diyode. the fans are working correctly now. will there be any problem?

i changed it with this :

i have two gt2560 brand new boards down now with this fan blowing problem as soon as ya hook up more then two fan it blows out the board with a shout out sound . any one know how to trace it back to the power control reg

going to need more then one of those 4148, one heats up to much and cracks try 3 seams to work