MacBook fail

Mid 2012 MacBook Pro

Spilled (1oz ??) Diet Coke on keyboard, screen went to snow, turned off immediately, 48hrs of rice, opened back shell, lower left edge (left side of fan) had some patina(?) on the top side of board. Cleaned with alcohol and can of compressed air. Attached pwr cable. Noted that batt was still charged. And posted on, No noticeable issues. Business ad usual. Fell asleep and battery ran out. Went to recharge and now screen won’t power on, not even a flicker, keyboard back light does work, power cable indicator light does not come on (amber to green) this Mac had been updated. Had worked perfectly. I can not afford a new or used one at this time. If all is hopeless, and someone thinks they can fix it (pro bono) lmk and we’ll figure something out. Thanks for any and all help