Laptop screen problem - randomly flashing and doesn't stop until i turn off

I have a problem with my laptop and I have tried a lot of things to figure it out.

Problem = my screen will sometimes flash on and off and to stop it I close the screen or push power to sleep/hibernate. When I reopen or power up the problem is solved. If I leave the power on the screen does not recover until I put it to sleep or power down. It happens at random times. Sometimes two or three times a week. Sometimes not for months. It's been on and off for about a year now and I have found no real pattern to recurrence.

Tests = I have performed a number of tests to try to figure out the issue.

  • Replacing the battery. (Issue happens on battery and on normal socket power)
  • voltage stabiliser at the outlet to ensure no fluctuations in power supply.
  • unigene heaven benchmark and no issues.
  • updated to latest Windows 10 and all latest updates.
  • updated nvidia drivers to latest drivers.
  • rolled back to drivers from 2 years ago.
  • manually controlled the cooling fans using control center assuming the gpu and or cpu was over heating.
  • ran memtest86 and it passed all 4 runs. No problems.
  • I also manually opened my screen cover and fiddled with the ribbon presuming a lose connection. The issue is still there and not resolved.
  • I have taken to a tech guy at a computer repair shop and it's hard to get him to fix it if it doesn't do it for weeks. Sometimes it's perfectly fine and I play games or render video, other times it does it twice in a week.
I don't know what else to do, the device was bought from pcspecialist UK and is a clevo with the following specs.

Octane series 15.6" Intel core i7 8700k 3.7ghz 12mb cache 32gb corsair 2400mhz ddr4 (2x16) Nvidia geforce gtx 1070 oc1518mhz 8.0gb ddr5 250gb samsung evo 850 1tb seagate firecuda sshd

I have uploaded the flashing in a video if anyone would like to see it I can share the link. http://s000.tinyupload.com/?file_id=27296723048615748241

Any ideas or help in diagnosing would be much appreciated.
 

Kshipper

Posts: 546   +124
TechSpot Elite
You should try running a 2nd monitor off the HDMI (Probably HDMI?) ....just to see if it "Does it" with the 2nd monitor too. That might help you decide where the trouble lies.
 
You should try running a 2nd monitor off the HDMI (Probably HDMI?) ....just to see if it "Does it" with the 2nd monitor too. That might help you decide where the trouble lies.

Hi Kshipper, I have just managed to test it, turned on the laptop. It showed it's normal login screen then began flashing. I plugged in the HDMI cable to my TV and the TV display was perfectly fine whilst the laptop screen was flashing.
 

Kshipper

Posts: 546   +124
TechSpot Elite
Ahh so that tells you a lot then. The video card in the laptop is putting out a stable signal but the built in screen is the problem (possibly the internal connection). If you can do the swap yourself I would replace the screen. =)
 
Ahh so that tells you a lot then. The video card in the laptop is putting out a stable signal but the built in screen is the problem (possibly the internal connection). If you can do the swap yourself I would replace the screen. =)

Perfect thanks for the help. I'll look into changing it myself. I noticed something else today - I moved my laptop and the power cable came loose, the power had to switch over to battery supply and the screen went black for a second and then began it's flashing nonsense.

not sure if this is a significant issue, I presume it would be to do with interrupted power supply for a second and the screen powered down. then came back on under battery power and it flashed again.

after I slept the laptop on battery and woke it up, it was back to normal.
 

Kshipper

Posts: 546   +124
TechSpot Elite
The interruption of the power certainly sounds like it did affect the screen but it still means that screen has to be changed out. With the external monitor hooked up you could repeat the test of removing the power brick while it is running. I think you will find that it behaves the way it did before....external monitor OK---laptop screen has issues.