Dell 7577 Laptop screen issues

[Yudi]

I have a gaming laptop. Dell 7577. I have been facing 2 problems after using this laptop for a year now. 

 

1. Heating issue: When i play CS GO even on the low settings my laptop heats up a lot. I tried MSI AfterBurner to undervolt but didn't work.
2. Display Issue: I have attched a photo of my laptop screen. It happened 6 months before. Out of blue on my laptop screen i can see some giggling dots and then when i play some game or my laptop heats up a pink bar from bottom of the screen rises up and then screen binks. When laptop cools down bars is still visible but only sometimes and those dots are there. So i decided to use my laptop as a CPU and connected a external monitor to it and after 1 month when i unplugged my laptop from HDMI i saw the Display was fixed and working properly. And now after 6 months It's happening again.

Please suggest me what to do as i think it's something related to software and not hardware.

[Yudi]

Seems like LTT community has no solution for my problem. 

[RiskySoul]

i had the same problem 5 months ago but after i updated the card,, it didnt come again ,,,i dont know the reason why it comes and not sure if i know why it disappeared