My Laptop Screen Flickering as i plug in the Charger

[holllwen]

My Laptop Screen Flickering as i plug in the Charger and when it plug out the charger it stops and become stable ..

and when i plug in the charger and open any game the screen stop flickering . but if i dont open any game and just browsing or working on any programe as photoshop it keeps flickering until it plug the charger out again or open any game to make it stop .
here is video
https://youtu.be/0LbJDGxYsvc

note : the problem is not in the screen i have changed it with new one 3 days ago and still the same problem ..

- when i connect my laptop with another screen using HDMI it doesnt flicker at all

 

[holllwen]

my laptop is Lenovo Y50-70

some people told me that is it problem with the charger
and others told me that the screen refresh rate they told me that in unpluged mode it is 50Hz so ot works smoothly and in plugged mode it is 60Hz so it start to flicker .. but i tried to change it to 50 Hz but i couldnt the only option is 60 Hz ...

 

[mortemas]

What else is plugged into the outlet with the power supply? Try it in another outlet by itself. Is that an air conditioner I hear in the background? Devices with motors can introduce noise into electronic devices that are plugged into the same line.

 

[holllwen]

i tried many outlets and tried it also in another house and in nearby cafe but still same problem ..

but something happened that when i went to computer mall to show it to some technical guy when i plugged the laptop there with my charger it never flicker ( so he asked me to record the problem when it occurs with my mobile as in thw video that i linked it .. then i went home ) and when i came back home i plugged it too with my charger and it didnt flicker for 2 days then the it flicker again after 2 days and the same problem occurs since that day ..

 

[mortemas]

Ok, so the problem is intermittent. It could be internal to the power supply or something inside the laptop that is bad. I’m wondering what happens when you wiggle the plug in the laptop. It could be a bad connection there. It could also be heat related. Maybe it was cooler at the mall?