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Released by Samsung in March 2016. Model SM-G930.

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Why does my screen go black when the phone is too cold?

This started back in November, My phone would get too cold and would have a flickering screen. I tried many factory resets but no such luck. I switched to another phone for a while but am back to the S7. If the phone temperature is too cold the phone screen goes completely black and I can’t see. I literally have to place my phone a heater in order for the screen to light back up. Everything else is still functional I just can see what I am doing when the phones internal temperature is too cold. (was in the 60’s this week and it still was too cold or the screen to work)


What can I replace for this to work?

Respondido! View the answer Também tenho esse problema

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Mine does it too. It started when I left it in cold. It dinner and flickered two thirds at bottom. Top fine. Then yesterday it goes to black two thirds bottom. I remember where the slide buttons are so I can answer it. The hair dryer heats it and I can use it for 2 minutes. There should be a recall. No more Samsung for me. It's from China anyway

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Hi @akeyes ,

When the screen is black, is there still are display visible if you shine a torch at an angle close to the screen? I’m not quite sure from your question if there is or not.

If there is then there is a screen backlight problem.

Cold contracts, heat expands.

if the screen backlight fails in the cold in may be a backlight power supply problem on the motherboard, (faulty soldered connection perhaps), a display flex cable connection problem at the motherboard end or in the screen itself

Here’s a link to the ifixit Samsung Galaxy S7 Screen Replacement guide, which may be of some help in checking the motherboard and flex cable motherboard connection for any obvious problems.

As a DIY repair you may have to install a new display to determine where the problem is, either in the display or back in the motherboard.

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@jayeff There is a flickering until the phone goes black. Additionally the top half inch of the screen stays at the normal lighting while the rest of the screen flickers and goes black. So I can literally only see the top notification bar and nothing else.

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Hi @akeyes ,

It does seem like a faulty backlight connection in the LCD screen.

Can you see if the display is still there when using a torch, it will be very faint? You didn't say.

As I said you may have to replace the LCD screen to prove where the problem is.

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I have the same problem with my S7! Top half inch stays at normal lighting while the bottom either flickers with dark horizontal lines or goes completely black when it's cold. Sometimes when it's borderline cold I can lower the screen brightness and be able to see flickering, but if I turn the brightness up it goes completely black. However if it's too cold then turning down the brightness won't help either.

Haven't tried the flashlight

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FIXED!!! Definitely faulty wiring, I have/had the same issue. I was just pulling my case off to warm up my phone to see it and I ‘pushed' or ‘bent' the top of the phone back (like if you were trying to snap it in half pushing metal side to screen side in the middle and screen side to metal side at the ends) and it suddenly went normal!! No banding no black lower half!! So somewhere in the phone is a loose connecting that gets lost when the metal contacts in the cold. Wondering if other people like me usually remove their case from the bottom……

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U have just saved me $150 for screen repair..as soon as I bent it or tried to the screen cleared & is brighter than ever!!

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I've got the exact same problem with my S7. Five minutes on a space heater just so I can use it for three. Unfortunately this fix is not working for me

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I'm glad I'm not the only one. Well that sounds bad I just mean that I wouldn't have seen this fix! But I have the EXACT same problem. Samsung S7. It has a hairline crack in the screen which I don't even notice, so I thought that preceded and/or was the cause of this issue. I'm just reading this so I haven't tried the fix yet. So I'm going to push in the back middle by the top (foward), while pushing the front corners towards the back? I hope I get this right...

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Nope....I'm not having much luck here. What a bummer. I've been trying in both directions. If there's any other hint to this I'd be really happy to hear it. As in...should I be doing this on the vertical ends? Or just side to side while looking at the phome? If the latter...were your fingers more towards the top, middle or bottom? Sorry to be a pain...but I'll try anything at this point...I just don't want to break it! ....thanks ahead for any more assistance :)

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