Inspiron 3454 AIO, won't stop going to sleep

Hello there,

For sleep issue on your system first check out the power setting i the control panel make sure sleep mode is the appropriate situation. Verify power setting and set sleep timers according to you

I hope this is helpfu for you

You sure about "Inspiron 3454 AIO"? I don't see that model number listed on Dell's support site. There's an Inspiron 3452 AIO...

What version of Windows?

Are you streaming these vids/movies over WiFi or Ethernet, or using a USB DVD player?

Have you set the active Windows Power plan to "Sleep: Never" and Turn off monitor: Never"?

Have you gone to the Advanced settings screen for that active Power plan and disabled Hibernation, Hybrid Sleep ?

@RoHe​ thank you for the reply. I think I mistyped the model. In the about information for the PC it says it's an Inspiron 7548. Which is wrong, that's a laptop model. I think I found the correct model in BIOS but it's an Inspiron 3455. I have changed all the settings you asked about to never. Usually I'm streaming the videos, but it's also when I'm playing a file from a drive and when I'm using the optical drive. 

@jesica150​ Appreciate the response. I've changed all the settings and it still sleeps. 

@Fletch3r - Go back to that  Advanced settings screen for the active Windows power plan.  At the top make sure it's set to High Performance.

Then make sure Hibernation, Hybrid Sleep, USB Selective Suspend, PCI Express Link State are all disabled. Set Wireless Performance to max on that same screen, and change Processor Power Management to 100% for both Min and Max. Save the changes to the power plan.

Next, open Device Manager and expand USB.  Double-click each USB entry and if it has a Power Management tab, uncheck the box "Allow PC to turn off...". Repeat the process for each Human Interface Device listed that has a Power Management tab, and do the same for your Ethernet and WiFi network adapters.

Reboot when done and test again...

Thank you for the reply. I did everything you said and it's still happening. 

And sleep is set to Never and hibernation is set to Disabled? 

@RoHe​ yes. Is it possible there's something deeper. I truly believe, for some reason, this PC thinks it's a laptop without the batter attached so it sleeps to conserve. In power options is Dell Power Manager Lite and when I click a new screen pops up that says it's waiting for batter connection. I've been trying to uninstall or delete it but it doesn't show up under programs. I also had a friend suggest that maybe the batter on the motherboard is dead. Is any of this possible and the problem? 

Wouldn't expect a failing motherboard battery to cause this kind of symptoms. 

More likely a software issue, so try this:

1. At desktop, open a CMD prompt window, Run as administrator
2. At the prompt, type in: chkdsk c: /r and press Enter. Accept offer to run chkdsk at next boot and reboot. chkdsk will run before Windows loads so be patient. When PC is back at desktop, open the chkdsk log to see if there are any "unfixed" errors.
3. Assuming no unfixed chkdsk errors, open CMD again, as in #1.
4. At the prompt, type in: DISM.exe /Online /Cleanup-image /Restorehealth and press Enter. Be sure to include a space in front of each / and note any error messages when that's done.
5. Assuming no "unfixed" errors in #4, at the CMD prompt, type in: sfc /scannow and press Enter. Be sure to include a space in front of the / and note any errors when that's done.

Assuming no "unfixed" errors in any of above, reboot PC and see if that fixes the problem...

Uninstall Dell Power Manager

@RoHe​ I can't. It doesn't make sense. It shows up in the advanced power settings and the program opens when I click it but when I search for it anywhere the program doesn't show. I tried the rest of your suggestions. I had some errors when I was doing the scan that I need to look up and see if I can remedy. Thank you for your continued help.

Exactly what errors did you get and from which scan(s), chkdsk, DISM or sfc ?

Have you looked on the Windows Add/Remove screen for Dell Power Management, especially on the Startup page listed on left side when Add/Remove opens?

You can also try this...

Click Start>Run>type in: services.msc and click OK. When services.msc opens, if a "Dell Power Management" service is listed, double-click it and change its Startup Type to disabled.  If it's not listed, or even if it is, you might also want to disable every "Dell" service you see. Don't change the settings for any other services in services.msc.  (Note: You can always turn any of those services  back on again, if you need any of them.) Then reboot and see if the sleep problem is fixed...

If the 3455 is 5+ years old, try changing the size 2032 MB battery.  Bad batteries cause bizarre problems.

@RoHe​ weird update. 2 days ago the PC froze and I had to restart it. Suddenly the screen stays on. 

@Fletch3r  - Look in Windows Event Viewer and see if an error(s) got logged for that freeze.

Ignore Kernel 41 errors which only mean Windows wasn't correctly shut down (it froze)...