Makerfarm i3v heat bed not heating up

Woke up this morning to a finished print, came out great. I went to start the second part and the bed wont heat up. I just got done changing the wires twice and the thermistor is functioning, goes up when I put my finger on it

Could something be fried on my ramps? I have an extra so that's probably my next step.

thanks in advance.

turned out to be the spot for power on the ramps board melted.. luckily I had another fried ramps so I did a swap and all is well.. Made a mount for a 60mm fan to cool it off and turned my voltage down on my power supply a little.