Hi I have pretty much the excat same issue, my model number is: NP940Z5L... When the battery is plugged in, there is never any issues, the screen always works okay. When I use it on battery (either from resuming sleep/hibernation) or powering off and back on again, I get the same black screen with a few grey lines, however, when I push keys on the keyboard it responds so everything is still working but the screen is completely black... rebooting does not fix it, I tried adjusting some power savings settings but did not fix it. If it is always plugged in it always works okay. This is a brand new device I purchased from Amazon in the USA (not refurbished) However, I live in Canada and shipping this to the USA to be serviced when it occured less then a week out of the box is pretty unacceptable. Any other solutions/potential fixses? Pretty unhappy considering it is brand new, seems like a known problem, and I am not in the USA to service it.
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