Fried Stepper Driver? (2 replies)

Hi,
I've been causing myself more problems here lately, but it started with my heatbed failing. So I tried to test the mosfet and accidentally touched the probe to a fuse instead of a bed terminal. I didn't blow the fuse but saw a spark and my lcd display lost all of its digits and only backlight was on. After ordering a new arduino thinking that was the cause, I found that it wasn't. But when I plugged the ramps and arduino into usb power only, I found that two of the stepper drivers got very hot quickly. After removing the two and then plugging in the usb power again, I could actually read the display but the text was still very dim. So I tried unplugging all four of the stepper drivers and I could read the display perfectly as before. So I'm thinking my problem is either with the Ramps board or the stepper drivers. And the reason I'd lean toward stepper drivers is because when the two drivers got really hot and the lcd was out, I tried swapping them out with a non-hot one and I could faintly read the lcd and the driver did not get hot in the same position that the other one had. What do you guys think? Have you ever heard of the stepper drivers hurting from a short or anything like this?
Thank you