Newbie needs help with Rancher won’t start

Hi all I asked for help here and tried what was suggested here is where I am at . The machine is a 2007 rancher Trx420te7 I was told that when it first broke down it ran fine and was showing signs of trans trouble it was left exposed to the rain and snow for over a year with the display- meter without any glass on it I opened the meter display and it is destroyed full of water mud and corrosion not fix able .I have gone through the manual and tested all that I could everything test ok ,I can get it to run if I spray gas in the throttle body,but will not run on its own ,I have 51psi at the injector input and injector test ok as far as resistance and voltage.Could the damage to the display caused a problem with the PGM-Fi -Pcm – Ecm in short the computer in the manual it said there is a war to rest the computer but I have no display it also Sid I should replace the computer with one that was know to work in Canadian money that is $1000.00 plus shipping a expensive test even if that works I may still have trans problem to fix any ideas,what I can try next ,should I scrap it that would be a shame because it looks to be in great shape,is it easy or cheaper to try and change it to a cabarator instead of fuel injector any help would be appreciated.:icon_ cry: