Replaced motor with new one and now computer wont work nor will car start,checked all wires ?

Check wiring again if it was running normal before ya changed battery

Check power to starter motor solenoid, solenoid operation and starter motor voltage during cranking. If the starter motor is receiving power from the solenoid, but isn't cranking, then replace the starter motor.

Also check the condition of battery terminals, wiring and connections. Also check the earth wire from the body to the engine.

idler pulley siezed when hot. on the way off, the belt took out some wiring

If the positive wire is hot, its connection is bad, check and clean all corrosion at the terminal connections to the actual wire and at the terminal connection to the battery. Do this for both battery cables. Hope this helps, let me know.

take it back to the poeple that wired the car alarm they screwed up

check to see if it got fire or fuel pressure

Check wires on the starter motor are tight and clean.Have you had the battery checked.You are saying you have tried to recharge it.Thats telling me you failed.Anyway try a new battery or get a jump.If still nothing then change the starter motor.

Check your starter motor, sounds like a dud winding in it. Then starter reeds to be overhauled / replaced.

Can you bump start it or is auto? If it's a stick shift you can try to bumpstart it, if it starts then its a good chance that the starter is fried.

check the starter if you power it on and there is no click there is a possibility tat there is a problem with the motor of the starter.

I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482

Check the position of the wires with the coil, some coil in Hyundai have number 1,4,3,2 these number are the cylinder, in the motor the cylinder number 1 is the first of the left if you are in front of the hood, and check the spark gap to 1.0-1.1mm