m15 R6, will not turn on after sleep

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This Alienware m15 R6 is still under Dell warranty, but has not been been Registered to claim your Support services. Please click on Product Support and register this Alienware m15 R6. Then contact Dell and request warranty assistance. You should visit your online Dell account to create Service Request so that Dell Support officially knows that there is a problem to fix. When Dell Technical Support requests online session, agree so that they can use their diagnostic tools to fix software issues and/or order replacement parts for installation. 

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Did you figure out the issue?  My is doing the same thing.  Of coarse months out of warranty

No, we have not figured out the problem.  This is a brand new computer, just purchased from Dell on July 13th.  This is super disappointing.  We cannot return the computer for RMA since it's used in college for work.

We have been able to get the computer to turn on by holding the power button for a while to do a hard reset.  Then, ensure the computer is plugged in and firmly press the power button.  However, this is all anecdotal and should not be the case with a brand new $2K laptop.

Looking around, I see that quite a few people have the same "failure to power on" issue with this model.  Surprising that DELL has not addressed this issue yet.

We are currently working with DELL support to replace the motherboard in this laptop.  I am glad to learn that DELL will send a technician out and does not require we ship the computer back.  I will update this topic once the motherboard has been replaced.