lcd 12864-3d

[cschisler]

sir what next? please advise.

[William]

sir what next? please advise.

Thank you for your email address, my colleague will contact you.

[befarfan]

So I have a problem with my LCD screen, I was replacing the hotend of my printer and some of the screws were really tight because of filament residue, so I turned on the printer and set the nozzle to 155 deg. While I was unscrewing, I heard a little buzz, which suddenly stopped, however, I noticed that the LCD screen had turned off. I turned off the printer, and unplugged it, and kept taking off the screws. After replacing the hotend, I plugged it back and turned on the printer, the on/off switch lights up, but the LCD screen is still off as well that the fan for the control board doesn't work either. when I move the bed, the LCD and the fan work for as long that I move the bed. Will I have to replace the LCD screen or the control board?

[William]

Hi, When you turn on the printer again, do the three lights on your motherboard light up?
like this:

v3板正常工作情况.jpg (206.37 KiB) Viewed 11852 times

[cschisler]

Yes all 3 red leds are lit solid.

[William]

Yes all 3 red leds are lit solid.

Hi, When you turn on the printer, the three lights on the motherboard are lit but the screen is not lit.
You can reconnect the screen cable to try.
If the screen is still not lit, you may need to replace the screen and screen cable.

[befarfan]

Hi,
For my control board only one of the lights lits up, and it's not the one int the circle from the picture. So do I need to replace the control board?

[William]

Hi, the picture is not displayed,
but if the printer is turned on normally,
three lights on the mainboard will light up.

[cschisler]

i've replaced the cable still no display. where can i purchase the lcd display board?

[_kaktus_]

...
For my control board only one of the lights lits up, ...

Read the name from the PCB, and write which LED is lit.

Maybe you just need to buy a fuse.