Lenovo Yoga C740 not charging

Hello,

Lenovo Yoga C740

I haven't used this laptop in years. I found it and wanted to turn in on.

But: It won't charge.

The battery charge light (orange light) is not turning on.

The white light on the On/Off Power button is slowly flashing (every few seconds).

It won't turn on.

Any help would be much appreciated :)