Changed cmos battery, now Optiplex 745 will not power up at all???

[Frodo]

I was getting a low battery warning during boot-up so I changed it after shutting down and disconnecting the power cord.

 

I replaced the battery with an identical NEW battery, plugged the machine back in and tried to power up. I get nothing. It won't power up at all. Please help!

[mac_shinobi]

Not sure but dont you have to take the cmos battery out. Power it on, turn it off then replace the cmos battery then power it back on.

[Frodo]

I did take the new battery out, tried to power on without the battery being installed, but it still did nothing. No power up at all. AND, the system was working fine before I replaced the battery.

[laugbr80]

Have you tried starting it without the actual laptop battery in, but plugged into the power cord?

[Frodo]

Thank you, all of you who replied. (PS, it is not a laptop, but a mini tower) Anyway... Problem solved. I disconnected ALL power output lines, reseated them and all is working again!