03' Kawasaki 130DI computer problems?

[Spivy30]

I have a 03' Kawasaki 130 DI that ran great until last week, I went to start it and it ran for about 20 seconds and died and all the lights came on in the dash. I think the computer went bad unless it has a bad fuel pump. Ive tried to run it a few times since then and it just does the samething. it doesnt run funny or miss, just starts normal runs for about 10-15 second and dies.

I was think about just replacing the computer but I dont want to spend $500 to $1200 on one if thats not the problem.

Thanks for any help