Dears, i have this very expensive laptop from HP Spectre 360 15 with Intel graphic which now the screen starting flickering after around 4 to 6 months of usage. at first the flickering was very few almost once to towice a week but now it is completely flickering and i don't know what is the problem somethings when i keep the laptop away from mobile phones (mobile signales) and i turn it on it works fine but again after few hours of usage or even if i restart right away the flickering comes back.i hate this and i hate HP for it i will never ever buy any other HP product in my whole life. i saw this their community portal and saw lots of people have the same problem and there is no any response from HP so i though if i try Intel and see if you can help out.
Things i have tried:
* Installed, Reinstalled, Updated Graphic Card (even downgraded) drivers one by one and both together.
* updated my bios to lastest version, Defaulted my Bios settings the only thing i was not able to downgrade my Bios i used the previews version of bios available in HP (my laptop model) support/download section and followed the instruction the upgrading to current version works and downgrading is not working.
* restarting, resetting, with power plugged or unplugged anything i thought will work on restarting the device.
remember this problem appairs even when Windows is not started yet, when i open the bios setup the flickering is there still to it flickerings doesn't matter if windows starts or not.
Try to fully reset you laptop: disconnect the Power Adapter, remove the battery, disconnect the CMOS battery. Reassemble your laptop after leaving it disconnected for 15 minutes at least.
Before when i was changing the refresh rate from 60 to 40 it was getting fixed now thats also not working, even somethings the contrast was effect changing to to lower it was getting fixed but now no more.
Hope this helps
If this is happening in the pre-boot state, then it is not an issue you can blame on the Windows graphics driver. No, in this case it is more likely a hardware issue and you need to have it looked at. If the laptop is still under warranty, contact HP to set this up (if they'll answer).