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[Completed] [Q] cannot bigpart or upgrade my Xooms

I hope I'm not doing soemthing wrong here, but I've given up trying to update my Xooms. So I copy my post on Questions & Answers to this area. 50 views got no response over there. Any relevant information might get me interested again. Thank You, and please delete this post if it's out of order.
GreyBeard51
(newby with two xooms,a kindle fire, and Linux Mint 17) I love Xoom.
"I have two identical xooms. The model number lists as "Xoom". Android version is 4 .1.2 , build JZ054K, kernal version 2.6.39.4-g4e32b94 . I've been trying for days to update at least one of them. I'm using a Linux Mint 17 desktop. No Windows available.
I've tried everything I found on these forums, and nothing has worked. I have 32gb external sd cards in both of them. My first trak was to do it from the SD card but I found that recovery cannot see my SD card. I also tried putting " BigPart" in a directory called downloads, but that didn't help. I also tried loading it onto the internal card. Can't see it either way.
I downloaded the Linux android files and plugged in the USB cable. I could talk to the Xoom, and tell it to reboot the bootlooder into fastboot or recovery, and the Xoom would reboot but lock up at the "loading fastboot" screen. I tried sideloading the BigPart file, but the install would fail on validation. If I try to enter fastboot by rebooting it locks on the loading screen. If I load recovery on boot it appears to come up but It can't see the SD cards or accept the files from the computer (From adb).
One of these Xoom's I gedfied and the other was a google device when I bought it. Both got all of their last bunch of updates thru Google, until Google dropped them. Could the google updates have left something needed out??
As I understand the process getting Big part on the device is the first step. I have all needed files for the upgrade,on my SD cards and on my Linux machine. I just can't use them. Anyone have any ideas? Does anyone know where and what the OS is looking for during that attempted USB update??"

Hi there,
Sorry but this section is for helping guide new members on where to find their answer on XDA.
If you already founded the right place to ask, then wait there an answer or ask again in the general section for Android Q&A:
> Android Development and Hacking > Android Q&A, Help & Troubleshooting
Cheers
Thread closed, thank you

[Completed] I think I messed up something when changing the OS of a tablet.

Hello, I wanted to change the OS of my tablet, but I think I messed up somewhere, and now with Android "installed" it just doesn't boot up.
It used to have Windows but I wiped everything of the hard disk. Now it only gets a black screen after the boot which let's me choose Android-x86 or the same but in debug mode. Also, I am installing it from a pendrive, and when installation is done, it let's me choose to just run Android or reboot. If I choose the first, I get the Android text, if I choose the last, it will reboot it, but no Android text or anything, just a black screen.

XDA Visitor said:
Hello, I wanted to change the OS of my tablet, but I think I messed up somewhere, and now with Android "installed" it just doesn't boot up.
It used to have Windows but I wiped everything of the hard disk. Now it only gets a black screen after the boot which let's me choose Android-x86 or the same but in debug mode. Also, I am installing it from a pendrive, and when installation is done, it let's me choose to just run Android or reboot. If I choose the first, I get the Android text, if I choose the last, it will reboot it, but no Android text or anything, just a black screen.
Click to expand...
Click to collapse
Hi
Thank you for using XDA assist
May we know what device do you have so that we can check if there is an available thread here @XDA Regarding your concern?
But, you may wanna consider creating an account first before you can post your reply here.
Thank you,

[Completed] TCL M2U problems trying to flash.

Hi, not sure if I am posting this in the correct place but am having problems with a TCL M2U ( which appears to be riddled with viruses and is next to unusable). I was planning on attempting to flash it but can't get it to connect to the PC (any PC), and even the option for connecting via USB in storage settings is 'greyed out' and cannot be selected.
Is it possible to flash it from the SD card maybe, I can access a (Chinese) menu by pressing the power up button while powering on, but my reading of Chinese is somewhat lacking unfortunately.

Managed to get a recovery working on the phone, ( from here http://www.needrom.com/category/tcl/m2u/ ) but when I try to flash the Amigo rom from there it fails.
Managed to flash the Lewa rom though, so have phone back in action (to a certain extent), but would prefer a different rom.
Was getting ERROR 7 using CWM to install the amigo rom, but was reading here ( http://forum.xda-developers.com/showthread.php?t=2522762 ) how to fix it, but when I open the 'updater-script' file in notepad, it does not appear to have any of the 'assert' lines referred to in the fix.

Hello and thank you for using XDA Assist,
please create a new thread here. The experts there should be able to help you.
Kind regards
Trafalgar Square
XDA Assist

[Completed] The operating system on your device has been modified in an unauthorized way .

I can't check for updates or update my OS (My device is a Tab S) .
I remember using a program that needed usb debugging to recover deleted files from android and it said it would make a one-click root then remove the root after it's finished but the program never worked and got stuck so I unplugged my tab and I suppose it changed something in the system files trying to recover the deleted files or didn't remove the one-click root , I tried removing my sd card then wiping my cache partition but this didn't work . The device was never rootes or modified in anyway , any ideas ? The device works fine except for this .
I would appreciate any ideas .

Hello and thank you for using XDA Assist,
please create an account and ask in this section:
Galaxy Tab S Q&A, Help & Troubleshooting
The experts there will be able to help you.
Kind regards & good luck
Trafalgar Square
XDA Assist

[Completed] Tablet shows no commands, the usb depuration wasn't activated, pc won't recognize it

Well here I have a wonderful problem, I have two devices, according to the working one and cpu z:
4x ARM cortex A9 @1.42 ghz
revision r3p0
Rockchip RK3066
Model rk3188
Manufacturer Zowee
Android version 4.4.2
bootloader unknown
java vm Dalvik 1.6.0
kernel 3.0.36+ (eng.candy.20150403.110733)
The device that has the problem is the exact same model and all, however, after plugging it to the AC current, it tries to boot up but enters into recovery mode, none of the options work at all, looking into youtube I found out that I can extract the firmware, so far so good, but, I can't use that method because RKROMDUMPER and RKAndroid_v1.29 need the tablet to be plugged and there is the problem, the faulty tablet does not load in that mode while plugged to the computer.
So I was left with the option of getting into recovery mode and attempt to update from external storage, so far the only "Firmware" or "ROM" I've got is the one I extracted from the working tablet, I have, backup.img, boot.img, kernel.img and so on, the biggest one is the system.img which is near 6GB size.
I really don't know how to proceed from this point, do I have anything usable with those .img files? I have tried downloading a 4.4 Android rom, the recovery tried to load the files contained in the zip folder yet the loader showed messages such as, bad footer, or invalid image or always a denial message of whatever sort you may imagine.
So, I am stuck, reading further more I discovered that there are other methods or even other roms that can be loaded, but the Zowee guys have near to nothing to work with.
Could you please help me with this? Are the .img parts usable or in some way "joinable" like merge them into a single file or directory?
The device was not rooted, so I am left with only the chance of fresh installing from sd card and nothing else.
Thanks in advance.

Hello and thank you for using XDA Assist,
please create an account and post here:
Android Q&A, Help & Troubleshooting
The experts there will be able to help you.
Kind regards & good luck
Trafalgar Square
XDA Assist