I was checking the voltages on the stepper drivers when I accidentally shorted something out, causing a little puff of smoke. The bed and extruder still heat up but nothing moves now. What all do I need to replace? Just the RAMPS board or Arduino as well? Also, the LCD is blank when just powered by the power supply but works fine when I plug the USB into my computer. Any help is appreciated, as I need to get it back running ASAP!
So mega for sure? There is no visible damage on it and it powers up just fine when I plug only the mega into my computer. But in any case, a new mega and ramps 1.4 should fix the problem?
remove all driver boards and see if the display comes to life, if you have a shorted driver, it will show a blank display.
If display now works, switch off power and try 1 driver at a time.