New Prusa i3 Printer Will Not Pre Heat

Hello, I just recently purchased a Prusa i3 off ebay and ran into some issues so I figured I will need an account on here....

Here is the printer I bought

So I got everything together, aligned everything and leveled the bed but when I Tried to "Preheat PLA" the extruder nor the bed starts to heat up. (I contacted Prusa and they just sent me the same link to the youtube instructions)

The display says this:

"E1: def /190C -> 0%

B: def / 60C -> 0%
Preheat PLA"

I've checked the wire connections multiple times and i'm positive that everything is connected properly.

Any ideas on what could be wrong or how I can fix this?

Also, do I need to download a firmware offline or is the board good to go as-is?

Quote
Collinkellar
Also, do I need to download a firmware offline or is the board good to go as-is?

There is no link to what you bought.

Based on the display, I am wondering if the thermistor is working correctly. If not, that should prevent the hot end from heating up.

Try measuring the resistance on the wires heading to your thermistor.

It's measuring infinite ohms... Is there a common place that the circuit breaks or do I need to replace it completely?

Fixed the wires and it reads -.637 when on 2K
But the screen is still displaying 0degrees and the tip isn't heating

Both wires going to the hot tip are receiving (+) power. Shouldn't there be 1 (+) and 1 (-)? I temporarily connected the to the (+) and (-) and the tip began to heat up but I didn't want to leave it this way because I was unsure if it would shut off when it reached the correct temperature since the thermistor still is not reading even room temp.