laptop compaq Evo N610 C don't detect the battery

Hallo,

I've an old laptop Evo N610 C. It works not so bad, but it don't detect the battery, so I'm always need the power supply.
Has anyone a circiut schema or an idea to solve this problem.
If I look into the bios I can't check the battery, if I do the battery in an other EVO 610 C, the battery is full loaded and works fine.

greetings

Ok

Hello,
I have the same problem with my compaq EVO 610C, new battery and new power supply but it doesn't turn on. Did you get a schema or solution?

Thank you very much