1. pjtwyman's Avatar
    My Samsung Tab S8 screen (purchased in June) goes black unexpectedly. This can occur at any time. Sometimes when in an app, other times in the home screen or app drawer. It occurs both using VPN and when not using it. I only noticed it happening frequently in the last few days so I deleted an soundbar app recently installed and disabled a new Applock app I had commenced using. This does not seem to have solved the problem.

    When the screen goes black I try to use the fingerprint scanner to reawaken it but this is not immediately successful. Eventually the tablet lockscreen will appear and using my fingerprint I can access the tablet at the same point the screen went dark.

    The timeout in the device display settings is 30 seconds but the screen is sleeping and locking me out well under 30 seconds. I should add there dropping of the device or exposure to water etc.

    I would any advice that would help solve this problem.
    07-19-2022 06:42 AM
  2. belodion's Avatar
    Does this persist in Safe Mode, or is it too infrequent for Safe Mode to be worth trying?
    Laura Knotek likes this.
    07-19-2022 07:17 AM
  3. B. Diddy's Avatar
    Do you use a case? If so, does this happen with the case off?

    Are there any magnets near the device? I'm just wondering if something might be triggering the smartcover sensor, which is typically somewhere on the bezel.
    Laura Knotek likes this.
    07-19-2022 08:47 AM
  4. pjtwyman's Avatar
    Thanks. I am using a case. The cover flap closes using a magnet so perhaps I will try without the cover and see if this helps.

    PS
    I haven't tried Safe Mode yet.
    07-20-2022 03:34 AM
  5. B. Diddy's Avatar
    Is it an official Samsung case? If not, then it's possible for a 3rd party manufacturer to use a magnet that's too strong, and can trigger the smartcover sensor when the flip cover is folded back behind the tablet.
    Laura Knotek likes this.
    07-21-2022 01:15 AM
  6. pjtwyman's Avatar
    Sorry about the late reply. The cover is a third party one. The problem is persisting and happens while doing variety of tasks - streaming, emailing etc.
    07-31-2022 06:16 AM
  7. mustang7757's Avatar
    Sounds like one of 3rd party apps causing this , try eliminate couple at a time to see if it stops happening
    07-31-2022 11:43 AM
  8. B. Diddy's Avatar
    Sorry about the late reply. The cover is a third party one. The problem is persisting and happens while doing variety of tasks - streaming, emailing etc.
    Sorry, can you clarify -- do you mean the problem is persisting even with the case off?
    08-06-2022 07:37 PM
  9. pjtwyman's Avatar
    For the last few days the problem has not occurred anywhere near as frequently as before. It will happen once or twice in a 2 hour period rather than 5 or 6 times.

    I have not removed the cover partly because I worry about dropping or bumping this expensive device. Also as the frequency has significantly reduced with the cover on I am not sure I could make a judgement about the effect of it without using the device for several hours straight.

    One point of interest - when the screen does black out I can usually wake up the lockscreen by abruptly moving the tablet and laying it flat. Then I access via the fingerprint scanner.

    Thanks for your help
    08-07-2022 01:28 AM
  10. J Dubbs's Avatar
    For the last few days the problem has not occurred anywhere near as frequently as before. It will happen once or twice in a 2 hour period rather than 5 or 6 times.

    I have not removed the cover partly because I worry about dropping or bumping this expensive device. Also as the frequency has significantly reduced with the cover on I am not sure I could make a judgement about the effect of it without using the device for several hours straight.

    One point of interest - when the screen does black out I can usually wake up the lockscreen by abruptly moving the tablet and laying it flat. Then I access via the fingerprint scanner.

    Thanks for your help
    By abruptly moving it do you mean like activating lift to wake? Do you have lift to wake turned on? From that behavior it sounds like it's timing out from inactivity... that's why you see the lock screen when it comes back on. You really need to take the case off to rule that out. If it's not that it's something software related like an app, or a problem with the software itself. You may eventually need to factory reset to fix it, but I would try the other options first, unless you're okay with the way it's behaving now ¯\_(ツ)_/¯
    08-07-2022 04:33 AM
  11. pjtwyman's Avatar
    I looked through the settings and could not find anything resembling "lift to wake". The screen timeout is set at 2 minutes (it was 30 seconds) and it's not inactive for that length of time. I first noticed the problem while streaming when the screen should be automatically active for hours at a time.

    When the black out does occur I would think that the screen would wake using the fingerprint scan if it was a matter of accidentally enabling a setting. It doesn't do this.

    I suspect you're right about removing the case or a reset. The apps I am using are fairly mainstream -nothing suspect. I am not sure it's feasible to put the Tab into Safe mode and eliminate apps one by one.

    Thanks for your advice.
    J Dubbs likes this.
    08-07-2022 06:30 AM

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