Strange screen glitch/flash.

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
I've noticed an issue occurring with my Mac, which at first I was unsure was there, or was my imagination.

Sometimes for a split second the screen will flash- I can't tell exactly what it is, but it seems to be white from what I noticed. It is for a split second, and at first I was unsure if it was even happening and it was in my mind.

It only happens maybe once or twice a day. I honestly can't remember if this happened on my old Mac. Is this anything to worry about, or is it simply something to do with the OS refreshing the display and outputting plain white for a split second?

It's so fast, it is very hard to notice, and like I said I thought it could have been my eyes. I just don't want it to be a possible big issue.

Thanks, Conan.
 

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
What's the model #?
It's a 2013 15" MacBook Pro, 2.4GHZ quad core i7.

Says it is a MacBookPro10,1, with intel hd graphics 4000 1536MB, and an Nvidia geforce GT 650M. I didn't know it had two graphics cards as I bought it for music production.

How does this work as another question? Like which graphics card is working primarily, or are they both working at the same time? Could the flash be switching between the cards or something?
 

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
Does this always happen under the same circumstances (connected to power cord, running a particular program, etc.)?
It's always connected to power- I don't really run on battery as I am always usually at home so keep it plugged in.

I've only noticed it when running safari- but like I mentioned it has only happened a few times, and it is for a split second when it happens.
 

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
Try running if on battery only?

It's difficult to diagnose since it seems to be sporadic and only lasts a second or two.
Ok, I will give it a try.

I've only had the Mac for 7 days or so, so was not sure if it was my imagination at first. It really is only a couple of times a day, for a fraction of a second. Thinking about it, it might have only happened a few times in total, it is very rare.
 

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
do you by any chance watch Netflix in full screen while this happens?
I haven't used Netflix on this Mac at all, I only got it about a week ago. I think it is probably just something normal, and I am worrying as it is new to me. It literally is a fraction of a second, so short at first I thought it was in my head.

It happened once today, this morning when I was watching youtube. I've been on it most of the day since and haven't noticed it any more.
 

Schranke

macrumors 6502a
Apr 3, 2010
941
954
Copenhagen, Denmark
The reason why I aske is that I get a few green flashes (small boxes) for a fraction of a second, but only while I watch Netflix with subtitles. for some reason it is not pressent when they are off. Just noticed it today as I used Netflix on this for the first time.

The funny think is that I have never seen anything like it whit other players, including youtube
 

conanthewarrior

macrumors member
Original poster
Nov 5, 2014
41
1
Quite strange, I haven't tried Netflix but if I do I will let you know.

Ive noticed now that the screen glitch is just on the safari screen- it doesn't extend past the window of safari onto my desktop background (I don't often use safari full screen).

Knowing this makes me feel a bit better, as it seems just a random glitch in safari, and not an issue with the actual Mac.
 

Fishrrman

macrumors Core
Feb 20, 2009
20,155
7,101
OP wrote:
"It's always connected to power- I don't really run on battery as I am always usually at home so keep it plugged in."

It's not really good for the battery to run a MBP connected to power "all the time".

At least once or twice a week you should disconnect the charger and run it on battery power down to about 40% or so, then reconnect to the charger.

This "cycles" the battery and I believe will keep it in good health.
 
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