Meanwhile i recommend you to perform the following steps to isolate the issue and arrive at a fix.
Lenovo laptop charging light blinking orange.
Remove the battery out.
I finally was able to start charging it because i turned my computer off and restarted it.
Dec 19 2018 if your laptop battery light is flashing orange when plugged in or has.
Oct 31 2016 the orange light lit up bright without any blinking.
If the battery is.
Last night the battery was down to 13 percent and wouldnt charge and it was down to 8 percent when i just turned it back on.
Moreover please check if the laptop is shutting down completely or if it entering the sleep mode.
I kept trying a few solutions of draining.
Charging 0 20 red indicator keep flashing for 4s charging.
In this state the power led indicator light may do nothing when pressed or may blink 3 times but the laptop remains idle with a blank black screen.
Power off the laptop.
Several lenovo laptop models have had issues returning from sleep suspend or hibernation mode an affected laptop may be fine one day but wont power on the next.
The charging light will stay on indicating that the battery is getting charged.
With a laptop made by lenovo a blinking battery light that is orange may.