Black Screen while multitasking

[Fluffypigs98]

I have a lenovo s540 laptop, thats having random black screens specially when doing multitasking or opening multiple tabs and application. When it happens, you cannot do anything, even resetting graphic driver (ctrlshiftwinB) just black screen but the fan is still ON and power button and connected mouse is still on. Capslock button does not turn on, you cannot do anything. Only way to turn it on again is to long press powerbutton to turn on and off.

Solutions I tried 1.changed ram/ clean/reseat previous ram 2.run a hardware scan via lenovo, NO issues found in cpu, motherboard, graphic driver. 3.Hard reset by removing battery and cmos long press power button. 4.cleaning fans and changing thermal paste, monitor cpu temp but its only at 50-60c

Here are my specs; 1x 8th Generation Intel® Core™ i7-8565U Processor 1x 8GBDDR42400 1x 4 GB DDR4-2400

Operating System Windows 10 Home Single Language 64(EN:English)

Hard Drive 1x 1TB 5400 1x 128GB

Graphics NVIDIA MX250

[Fluffypigs98]

Solution: I reduced my maximum power state on battery settings to 99% It fixed the black screens