Optiplex 790 won't boot after replacing battery...

Computer wouldn't boot & was displaying the message that system time was wrong, so after resetting date & time, tried booting again & no luck. Going through all the troubleshooting options was getting me no where so I reset the BIOS setting to default & it was finally booting to Windows. I figured  replacing the battery would be a good option at this point & after that, computer will not boot. Power light is solid blue & lights 1 & 3 are solid.

I am open to suggestions!