The Power button and the battery light are both blinking at synchronized about 1/sec.  But the battery will not charge.  Power is plugged in and orange light is on at plug.  This was an a sudden event.. no problem charging, battery lasting long time then all of the sudden this happened.  Battery is internal so i can't pull it out.  

I have tried shutting down and restarting,  unplugging and restarting (immediately dies when power us unplugged) and pushing the reset hole button so that it bring up bios option at power up.  Nothing has helped.

Unit works fine while plugged in, it just wont charge the battery and wont work without being plugged in

Hi,

Welcome to the Lenovo forum community!

Please try the following:

Disconnect the charger from the laptop, and the wall.  

Make sure the laptop is powered off, then press and hold the power button for 60 seconds.

Reconnect the charger to the laptop, then the wall.

Now try to start your computer.

If, however, this does not solve it, then try the following:

Make sure your laptop is off, by holding the power button for 10 seconds.

You need to push the tiny button located (Go Here search with your serial number, then select pane "Knowledgebase and Guides" Then find the user manual and locate the Novo buttons placement in the manual), there is a small hole, with a button inside,  

You can use for example, a paperclip to press it, after you have pressed the button, the laptop will power on, and present a small  

menu, use the arrow keys to select BIOS Setup, and press the enter key to select.

now let it sit with the charger for a few hours, then unplug charger, and see if it turns off, if it turns off, then you will need a new battery, since this definately looks like a bad battery to me.

Tried your first method and figured it had a 10% chance of working, but it worked great!  Now everything is back working like it should.

Thanks so much!!!