The best solution would be to reformat the tablet to factory specifications. That should fix all the issues your having. If you want you can backup all your stuff using google and then type in your google account info after its been restored to get all your information back
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1. Make sure the mic is not set to mute.
2. Check your battery charge. Low charge may turn off video.
3. Your operating system appears to be Marshmallow. I am not sure what application you are attempting to use for voice chat. It might be Google Duo, Facebook Messenger, Hangouts, or Imo, among others. If an application is not working, one generally tries reinstalling it.
4. Another application may be running and blocking use of the mic. Check what else is running. I think holding down the home button will reveal what is running. Shut down background apps and test the app you are using. Google Play may have What's App to check this.
Before you reset your tablet (assuming it is an iPad)? Go to the gears icon (settings) next select general, scroll down till you find the Background App Refresh. From there you can see every app that is running and that essentially starts when you restart your iPad. Now just go through and select the apps you don't want to run upon start up. Or just shut them all off. This only tells the app not to run unless you are using it.
Try a reset (power + home) to unstick.
At worse, you can always download the apps again. You don't pay for that. Sometimes, when an app is not working properly, you need to discard it and download again. It's like rebooting a specific application on your computer.
Might be a good time to remove all the apps you have running. Double click the Home button and view the apps at the bottom of your screen. Tap each circled "x" to remove them.
Might be a good time to close some of the apps on your computer too. See how many have a little white dot on your dock. They all are taking up memory.
Tap on the "Settings" Icon, which should be on the home screen, then scroll down to "apps" in the window that then opens, scroll across to "All Apps", then swipe down the screen until you reach the first app or program that you wish to remove. Tap it's name, and in the new window that opens, tape 'delete', a confirm delete window will open to ask you to confirm that you want to remove it. Tap "Yes" and the app is gone!
NOTE! This WILL NOT work for system apps - they cannot be deleted without other expert changes being first made to the system. Only apps and programs you have installed can be easily removed
Please follow the below mentioned procedure to disable Demo Mode in Acer Iconia Tablets.
Tap on Apps in home screen - Settings - Storage - Internal Storage - Apps - Scroll down and Identify "Demo Video Application" under the apps list .
Tap on Clear Cache and tab on "Disable", Ignore the warning message. Note: Cust may see the "Demo mode" icon in the homescreen, however it wont bringup Demo Video
Regards
Hi Julie
If by larger screen, you mean Zoomed screen, it could be that you have turned on zoom in Settings / Accessability.
Also.... the iPad is "booted up" all the time. Generally all you are doing is Waking the iPad from sleep or screen in sleep mode.
To ReBoot your iPad (worth doing every month or so) First quit all Apps by double clicking round button and individually swipe each open App upward to shut the App down. When all apps are turned off, Hold the Top button & Round Button in together for about 5-10 seconds. This will shut the iPad down completely. When all off, Press the top button in for about 5 seconds. You will see the Apple logo while it ReBoots. This usually fixes any minor glitches etc in the Apps. If a particular App is giving problems, you can hold your finger down on it till the X shows in the LH Top of its icon. Click this and it will be wiped off your iPad. Then re download it for free through the App Store and check to see if problem has gone.
As soon as your iPad starts acting strange, it is time for a reset.
you can do this by simply closing all running apps. Press the home button twice and then swipe all apps up. They are closed then.
If all apps are closed, press the on / off button and keep it pressed till it says swipe to shut down. Swipe and wait till everything is out.
Then press the on / off button again, for a second or so. The iPad starts again.
Somewhat drastic, if you can't switch it of the normal way: Press and hold both, the on / off button and the home button, till the screen goes dark.Then the apple loge appears and again wait till the screen is dark. After that you can switch on again.
If it still does not work, goto settings then general then scroll to the bottom, where it says reset. then reset network settings. It will reset your network settings, but also the rest of the iPad. This is the most dramatic reset, without loosing your apps and documents.
One step further will wipe your data too, so that you must keep for the worst case and only after you are sure you have a backup on your computer from all your data.
Apps can be restored from the App store for free, if you have payed for them, but the data, unless you have backups, will be lost fro ever.
The best solution would be to reformat the tablet to factory specifications. That should fix all the issues your having. If you want you can backup all your stuff using google and then type in your google account info after its been restored to get all your information back
Many "shutdown issues" are caused by over taxing your memory with open apps.
Double click the home key to view the open programs at the bottom. Tap the "-" signs to close most if not all apps. Swipe down or click the home key to return to the main screen; then try again.
Is it really gone? From the home screen, swipe down from middle of the screen to show iPad search. Type "App Store" in the search box. Scroll down to Applications section. Is App Store there? If so, it's on your iPad - perhaps dragged into a group somewhere.
If not, plug your iPad into the desktop Mac or PC you're using to sync. Select the iPad in the left column and click the Apps header. Scroll the list until you find the App Store app. The button should say "Install". If so, click it, then sync your iPad.
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