I bought an Acer A700 tablet off ebay, was supposed to be new unused condition. Booted it up and it had no system bar at bottom of page. That means you can't get out of any app you have to reboot, useless. Thru reading on site and exploring this tab i found out it has super user installed on it and on bootup in the left hand corner it reads "boot loader ICS-MRI 7173de1 (unlock mode)" every thing on the tablet seems to work except no navigation bar, no circle in center, and no status info no bar at all full screen. I have played with this thing been on Acer chat and they say hard ware failure. That is before i new it was rooted, i guess that is the reason the update he wanted me to try did not work. I don't know if i try a new OS system if that will even work. I am 68 years old and this is my first android tablet, new ground for me. Most every thing i read is above my knowledge, would appreciate any advice i might just try it. thanks ahead of time
Ok, so whoever you bought it from, told you an outright lie. The bootloader is unlocked, and, it most likely has a custom OS installed on it. You can check this by going into "Settings" "About Tablet" and seeing what is installed on it.
The previous owner had root access (obviously) and went mucking around with the SystemUI.apk and goobered something up (most likely). In fact, I would guess he had CM installed and didn't like the way the nav icons were (in the center) and tried doing something about it by modifying files he had no idea of what to do.
The most simple fix, would just be to install a fresh version of either a custom ROM, or, revert it back to a stock factory ROM. Both of which are relatively easy to do.
EDIT: Other things to look for now that I think about it. Check your applications and see if any of the following are installed.
Launcher (Nova, Go, etc) These sometimes have an option to disable the system bar (Nav Bar).
ExPosed Installer - This allows loading of custom exposed frameworks mods that several have the option to disable the System Bar (nav bar)
Any Nav Bar/System Bar "Hide" application. These at one time were useful to open more display real estate for games. (not many use them anymore)
Those applications you can safely uninstall through Settings/Applications, then reboot.
Other than that, I can't think of anything else. Will wait till you tell us which OS is installed (CM; Cyanogen Mod, PA; Paranoid Android, etc)
Oh, and one more thing. Stop talking to those folks on Acer Chat. This is a software issue, and not a Hardware issue. This I can promise.
You are correct, i will never talk to acer support again. I am getting ready to install a rom if i can figure out which one to start with. It has Adroid Veersion 4.0.4 Kernal version 220.127.116.11+ Boot loader ICS-MRI 7173de1 (unlock mode) It has superuser app installed, I did download an app which gave me a navigation bar that i am using till i can get a rom installed. My problem is that looks like i need to upgrade this 4.0.4 ICS before i can install the up to date roms is that correct. Thanks for helping be get this straight this is a lot for an old man to take in lol.
4.0.4 should be the original ICS ROM. If you get it installed, it should get you a locked bootloader, and hopefully offer the upgrade to JellyBean (4.1.x I believe)
Don't worry about age, I'm not far behind you
Have an issue, just PM me and I'll see if I can help.
No that is what is on my tablet now unlocked and rooted. thanks. i am not clear as to get it upgraded form 4.0.4 and not sure if i need to upgrade to put new rom on it, and which one to work with. I have all my info downloaded on my computer, got to get a cable to work with. Just not sure if i can put the newest version on it without flashing it back to stock locking the boot loader upgrading and then rooting it again just to much i may need to take a break after 3 days of reading, but i have learned a lot. thanks what do u think