08-08-2019 05:17 PM
When I boot my Y740 15inch laptop, the keyboard lits up, but the screen is black (not even lit); it does that for 1 minute then the keys turn off and the process repeats itself again for 1-2 times; then it finally boots up (the screen is lit, lenovo screen appears, and signing in page appears). When waking up from sleep mode, it does the same, but sometimes even worse. Sometimes the keyboard is lit with a not lit black screen, and it stays like this for internity (literally; I waited more than 10 mins and it is still the same), so I hold on the power button for about 30 sec (which is surprisingly too much. I don’t know why it takes that much time to shut it down with the power button when it’s in that error) to shut it down then open it. And it surprisingly opens as if no error was there. Any help? My system and BIOS are all up to date; Never missed a single update and all my drivers are up to date.
08-10-2019 08:35 AM
08-10-2019 05:13 PM
Also as well, there is a problem when trying to shutdown; I hit shutdown then it goes to the blue shutdown page and them opens again automatically to the login screen menu. Trying to shut it down again, it does the same every time. So I have nothing to do except restarting the whole system then shut it down.
09-11-2019 08:31 PM
I also meet simular problem with 144HZ display. When I boot up , the screen never light up but keyboards has light up. I can hear the sound of loggin win10. But the display never show anything. Even when I add an extra display, no display shows anything. The only thing I can do to fix this is to wish I'm lucky enough to reboot Y740. There is little posibility that the screen would light up normally like 1 in 50. I don't know what else I can do to fix this.