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Problem w/ Mac Screen Lighting Up
07-13-2019, 06:52 PM
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#1
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Thinks s/he gets paid by the post
Join Date: Jan 2006
Posts: 4,172
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Problem w/ Mac Screen Lighting Up
Strange problem........normally when I raise the lid on the Mac, the screen lights up instantly. On occasion it remains dark for many seconds........
Yet it will act normally if I close/raise the lid again.
I know the Mac thinks the battery should be replaced but it works fine for my purposes .........guessing it will last 1-2 hrs before down to 80%. At first I thought it did it because the battery was low but it has done it when 100% charged.
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07-13-2019, 07:42 PM
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#2
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gone traveling
Join Date: Dec 2015
Location: Berkeley, Denver, CO, USA
Posts: 1,406
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This not the forum you were seeking.
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07-13-2019, 07:54 PM
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#3
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Thinks s/he gets paid by the post
Join Date: Feb 2013
Location: Toronto
Posts: 3,321
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Sounds like a faulty connection to backlight?
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07-13-2019, 09:18 PM
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#4
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Thinks s/he gets paid by the post
Join Date: Apr 2016
Location: Dutchess County
Posts: 1,599
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My 2010 Mac does that sometimes, I just hit the space bar a few times and it wakes up. It's not bothersome enough to have ever look for a fix.
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07-13-2019, 10:43 PM
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#5
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Thinks s/he gets paid by the post
Join Date: Jan 2006
Posts: 4,172
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 Quote:
Originally Posted by Just_Steve
My 2010 Mac does that sometimes, I just hit the space bar a few times and it wakes up. It's not bothersome enough to have ever look for a fix.
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Thanks.....I'll try that next time. I've hit other keys w/o success......return/enter key, etc.
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07-14-2019, 04:05 PM
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#6
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Full time employment: Posting here.
Join Date: Aug 2013
Location: New Jersey
Posts: 945
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I believe you are seeing different wake times because of display sleep vs. computer sleep. It only takes 3 seconds to wake the display vs. 30 seconds if the computer is sleep (depends if you have an SSD vs. regular hard drive),
More info https://support.apple.com/guide/mac-...0.13/mac/10.13
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07-14-2019, 04:51 PM
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#7
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Jan 2006
Location: Rio Grande Valley
Posts: 38,141
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Quit closing it. I suspect the hinge mechanism eventually wears out. Your Mac is probably pretty old if the battery needs replacing?
Hit the space bar to wake it up instead?
__________________
Retired since summer 1999.
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07-14-2019, 09:10 PM
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#8
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Thinks s/he gets paid by the post
Join Date: Jul 2009
Posts: 1,610
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07-15-2019, 09:21 AM
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#9
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Thinks s/he gets paid by the post
Join Date: May 2016
Location: Mid-Atlantic
Posts: 2,676
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Quote:
Originally Posted by stephenson
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Yes, when I had this exact issue on my last MBP, I had to reset the SMC and/or NVRAM, I forget which, but that fixed it.
__________________
-Looking to FIRE in the mid-2020s, which would be our mid-50s.
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07-15-2019, 05:04 PM
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#10
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Thinks s/he gets paid by the post
Join Date: Jan 2006
Posts: 4,172
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Thanks all for the tips. Now I know why my google search was not successful........I failed to use the technical term "sleep".
So far no luck w/ the space bar trick. Seems to awake after some 20 secs
w/, w/o the space bar............when there is a delay. Usually it's ok.
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07-15-2019, 07:33 PM
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#11
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Give me a museum and I'll fill it. (Picasso)
Give me a forum ...
Join Date: Sep 2005
Location: Northern IL
Posts: 26,889
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Quote:
Originally Posted by kaneohe
Thanks all for the tips. Now I know why my google search was not successful........I failed to use the technical term "sleep".
So far no luck w/ the space bar trick. Seems to awake after some 20 secs
w/, w/o the space bar............when there is a delay. Usually it's ok.
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I'm not so current on Mac issues, but I seem to recall there is "sleep" and "deep sleep". And I think "sleep" means it mostly shuts down, but keeps everything in RAM powered, so it is fast to wake up.
"Deep Sleep" is what some of us call "hibernate", where it writes RAM contents to disc. This allows it to wake up again, even if it lost power during "deep sleep" (losing power would also lose RAM contents). But it takes time to read the contents back from disc. Twenty seconds is a good ballpark for that.
Maybe some Mac people can chime in on how sleep/deep-sleep is triggered or if there are settings to control it.
-ERD50
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