It only turn on without the cmos battery

[eggy53]

So I got a e-Machine T4852 which had a dead CPU fan, replaced the fan.

But now I noticed that the computer doesn't want to turn on if the cmos battery is on place (Removing the battery will let the computer start to boot correctly into windows. Replaced the battery with a new one in case that the battery was bad but it still does the same.

Did a little research about it and some people had similar issues but turned to be power switch problems, so I decided to unplug the cables and jump the power, without luck.

What you guys recommend me in this case?