My Tab shuts down completely after about 60secs of non-use rather than sleeping, requiring On button / Down Volume press to start the tablet to boot up and then use as normal.
Even the On/Down Volume press takes multiple tries to get the restart/ boot to commence.
I had not varied the configs from new (6 months) when the Tab suddenly started to do this after a couple of hors non-use and I found it had shut down.
If your Galaxy Tab 9 FE shuts down completely instead of sleeping after 60 seconds of inactivity, start by checking the power settings in Settings > Battery and device care > Battery to ensure they are correctly configured. Update the tablet’s software in Settings > Software update, and perform a soft reset by holding down the Power button for about 10 seconds. Test in Safe Mode to see if a third-party app is causing the issue. If the problem persists, it may be hardware-related
