Ubuntu 19.04 Overheating on Idle

I recently installed ubuntu 19.04 on my laptop (Dell G7 7590). I have faced severe overheating issues. My laptop hits around 71 degrees centigrade even on idle. I’ve tried installing TLP, powertop, laptop-mode, slimbook and nothing seems to have helped so far. I believe the problem is in the CPU running at max freq at all times, but I don’t know how to resolve this.

I tried:

echo '1' > /sys/devices/system/cpu/intel_pstate/no_turbo 

and there has been no change.

I am fairly new to both Linux and the forum so any help will be much appreciated.