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A black screen on a relatively new Dell XPS 12 Convertible

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Thomas Zucker-Scharff
Veteran in computer systems, malware removal and ransomware topics.  I have been working in the field since 1985.
Dell XPS 12 CoonvertibleI am not new to IT, I have been working in the field since 1985.  But recently I came up against something that stumped even me (it doesn't happen as often as I would like).  I was running a screencasting session from the laptop to my TV via ChromeCast (I love it).  About half way through the movie that my wife and I were watching, the screen on the laptop went black.  I figured it was because I didn't have it plugged in and it was conserving power.

When we finished I tried to wake up the computer in all the normal ways.  The keyboard lit up but the screen stayed black.  

I tried rebooting, but holding the power key for the 10 seconds I usually do for my desktops, if they have a similar problem, did absolutely nothing.  I decided to wait until the next day.  In the meantime I charged it up, it was down to 20% according to the lights on the side.

The next morning I woke up and when I had gotten dressed I tried waking it again - no luck.  No luck trying to reboot either (this time I held the power toggle for a count of 20).  On the bus on my way to work I asked the one person I thought might know the answer, my son Aram.  He is a wiz with computers, has one of these very laptops, and has a degree in Computer Science/security (check him out at aramzs.me).  I texted him and after a couple of back and forth questions he suggested trying the reboot again, by holding the power toggle longer (these machines apparently need that) - his words were "a long time".

I held the power toggle for a count of 30 and it worked!  The machine shutdown.  I turned the laptop back on and did a regular shutdown (I suggest this to anyone who has to do a power button shutdown - if  you can that is).

I am still unsure if this is a machine specific problem or something specific to Windows 8.1.  Either way this solution worked for me.
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by:bill slevin
Having the same problem but it will not come back on, I held it for 60 and nothing.. the screen will not come on at all and the laptop is 3 days old. the system starts up because you can see the lights on the keyboard.
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by:lherrou
I had the same problem recently with a Toshiba laptop. After going through all this with their tech support, it turned out to be a bad motherboard and had to go back for replacement.
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