So if everything else on the printer seems to work there's a very good chance that this chip is smoked:

ScreenShot 1276 Aug. 17 16.33.jpg

You can buy the chips on aliexpress for $3 or so, from digikey for $20 or so, but best fastest option is to buy a breakout board that uses this chip on amazon or ebay for maybe $10 and swap the chip.

This is pretty simple to do but you do need at least a good soldering iron. Good flux like chipquick really helps too.