04-23-2019 06:24 AM - edited 04-23-2019 06:30 AM
I have a Yoga 730-15IKB. This morning the screen would not turn on. The computer starts but the screen is black. I did the unplug, turn off, and hold the power button for 20 seconds.
I hooked up to an exterior monitor and the computer worked was working but still had a black laptop screen. When I went into the display setting the computer did not detect or see the laptop monitor only the external. I ran the self diagnostic and it also did not detect the laptop screen it only detected the external monitor. The diagnostic said the gpu was running fine.
04-23-2019 06:59 AM
I'd actually give the power-button hold treatment a full minute, just to be sure. On the surface, it sounds as if it could be a bad panel or something as simple as a bad cable or one that simply needs to be reseated. If you're comfortable working inside of a laptop, you can try reseating the display cable, making sure to take all of the usual working-inside-of-a-computer precautions.
But, yeah, if an external monitor works, the gpu is fine.
04-23-2019 07:09 AM
If it was me and its under warranty I would contact support before trying to check cables. Don't want to take chance support will say I damaged the laptop.
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04-23-2019 07:12 AM
Yes, absolutely don't fool with anything if it's still under warranty. My bad for missing that. Thanks for the catch.