93 Ramcharger suddenly died

I will add that I bought the truck just over a month ago it was in very bad maintenance shape and I have replaced B/C it was bad: coil,cap,rotor,wires,plugs. Battery, cables, all hoses. Temp sending unit, O2 sensor, belt,tensioner, t-stat,all new suspension. exhaust, cat converter. I was able to pull the codes last week and it told me the O2 sensor and temp sending unit were bad. After it broke down it's not showing anything at all now. Makes me think it may be the puter.
Looking at all I had put into it, makes me wonder why I bought it.