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Released on August 22, 2022, the Z Flip 4 is one of the folding phones Samsung has made over the past few years.

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Sub screen not working while upper speaker connected. Flip 4

Hi. I need some help. Few days back I have changed screen with frames (its because of broken hing after fall) also changed both baterries because old was already convex and I could not mount back covers :D

From the old frame I have took upper magnet (hall ic i guess) and mount it into the new frame. After this phone starts normally, both screen working fine but only problem is that its not turning on/off after I close it.

So my flip 4 when folded is not turning black main screen and back screen is not working (it seems like hall ic not working). In the test menu (*#0*#) when testing hall ic it also seems not working when folded, but when I put some metal staff on the front screen it says working pass, when i take it away it says realese pass. The same way i can turn main screen off and activate back screen, but still when folded its not working.

Now, most interesting thing - if I dont connect upper black cover with speaker connection its folding just fine. When I fold it its turning black and back screen works, when I open it its turning main screen on.

Now the question is - whats wrong with this plastic speaker cover that is preventing flip to works with hall sensor when connected, or maybe problem is somewhere else? But why its working fine without this upper speaker connected. I'm adding photos to let you know what plastic cover I'm talking about. Thanks!

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Отвечено! Посмотреть ответ У меня та же проблема

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It's literally a question of 1\4 of a mm. You noticed that if magnet pushed right in. It will fold go off and it will not light up again until you put like a screwdriver against magnet.

My solution. Use some T or B7000 glue and put a good layer under magnet and also a tiny bit to stop it touching frame. Manoeuvre it while it's setting and then press it a little while you do your open and closing. You'll know what I mean. Too far against frame and it will do the close and not come on. Too far out (raised) and it will literally do what yours is doing. Stays on even when shut.

(I nearly stayed with this as I knew I could at least use fingerprint power button to turn it off at least. Which was better than I had originally where it wouldn't go on unless I put screw driver or metal object that would cling magnet. When that happened it stayed on power button or any action until I closed it again.)

Anyhow I got it perfect in the end, and I had same, with black cover over. I think personally the little bit of glue at top between the frame and magnet also kept it level. After I got this right with the black cover over magnet and board it was perfect. You have plenty of time to slightly move it before it sets.

I did mine earlier and fully tested it, and it is now all back together, and is the phone I am writing this on.

I will say this is an amazing bit of engineering if it's sensing magnetic field measurement or something. But yeh it is annoying.

Hope it helps. Good luck

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That's it! Thank you a lot. I would never guess that 1/4 millimeter move would affect it as this. I was like overthinking it for 2 days lol. I'm already waiting for glue to dry with magnet, test it again and close it up. Thank you again!!

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Yes I wa shocked, it's quite a mad bit of engineering. Glad your good

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How do I measure 1/4 mm 🤔 I'm trying my best to find that sweet spot. Will it be easier to do it while it's folded, will it be easier to glue down the bottom magnet first and instead of the t or b7000 glue can I use all purpose cement glue. Also when said to put some on top what do you mean by that?

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