Develop Bugs

[Q] Need help with my E-988

I hope someone can help me.
I bought an LG Pro E-988 which is already rooted and have a nightly CM11 installed.
I saw the LG Flex Rom and tried to install. I hit an error (Status 7), so I restored my back up. It booted correctly and decided to install/run the LG Recovery and Freegee apps as I suspected that the error (Status 7) was because I didn't install the apps before the LG Flex ROM.
After I run FreeGee, I restarted in recovery and tried to install the ROM but still same error (Status 7). So I decided to restore my back up again, but this time around, the boot is not pushing through. I'm stuck in the LG Logo.
Has anyone experienced this before and maybe you can help me to fix my phone.
I admit I got a bit excited rooting and flashing custom ROMs again after 1 year of hiatus.
Thanks in advance!!

hd2_droid said:
I hope someone can help me.
I bought an LG Pro E-988 which is already rooted and have a nightly CM11 installed.
I saw the LG Flex Rom and tried to install. I hit an error (Status 7), so I restored my back up. It booted correctly and decided to install/run the LG Recovery and Freegee apps as I suspected that the error (Status 7) was because I didn't install the apps before the LG Flex ROM.
After I run FreeGee, I restarted in recovery and tried to install the ROM but still same error (Status 7). So I decided to restore my back up again, but this time around, the boot is not pushing through. I'm stuck in the LG Logo.
Has anyone experienced this before and maybe you can help me to fix my phone.
I admit I got a bit excited rooting and flashing custom ROMs again after 1 year of hiatus.
Thanks in advance!!
Click to expand...
Click to collapse
Nothing to worry about. Here is a pinned post where you can find all the information you need.
Just download your kdz from here and follow the steps from this post
Download kdz, install lg flashtool, lg drivers, after turning off your phone, press volume up and down together and connect your usb cable to get into download mode, then follow those pictures in that post to flash the kdz. You will be back to stock.

spirallingspiral said:
Nothing to worry about. Here is a pinned post where you can find all the information you need.
Just download your kdz from here and follow the steps from this post
Download kdz, install lg flashtool, lg drivers, after turning off your phone, press volume up and down together and connect your usb cable to get into download mode, then follow those pictures in that post to flash the kdz. You will be back to stock.
Click to expand...
Click to collapse
Thanks a lot man :good:! Although, I'm stuck with 'Connection error' in the FlashTool. Is this normal? I tried again and again more than 20 times but I'm getting the same connection error.
Also, earlier I was still able to go to recovery, but now even if I press the power button it goes straight to the download mode.
Hope you can help again.

You cant get out of download mode? did you try volume down and power button together for 5 secs? And btw what error are u getting on flash tool? its not detecting your phone? Did you install the mobile drivers?

spirallingspiral said:
You cant get out of download mode? did you try volume down and power button together for 5 secs? And btw what error are u getting on flash tool? its not detecting your phone? Did you install the mobile drivers?
Click to expand...
Click to collapse
The error was in the LG Mobile Support Tool (sorry to in the Flash tool). During the upgrading of the phone it always give the error - 'Connection to server failed. Try again in a moment'
Also, if I try to turn on the phone it will not boot but go straight to download mode.

hd2_droid said:
The error was in the LG Mobile Support Tool (sorry to in the Flash tool). During the upgrading of the phone it always give the error - 'Connection to server failed. Try again in a moment'
Also, if I try to turn on the phone it will not boot but go straight to download mode.
Click to expand...
Click to collapse
Did you remove the battery and put it back in? And it still goes to download mode? Try starting the phone pressing Volumedown+power key for sometime or you could try Volumeup+Homekey+Power to boot into recovery and try restoring backup or flashing some other rom and see if you can get out of boot. I really don't know why you are getting that connection problem. I got stuck at boot a couple of times and followed exactly what was given in that post and reverted back to stock. I guess some of the senior members will help you here. Meanwhile ill see if i can search a solution for that connection error, i haven't faced that yet so i really don't know the fix. There is a second TOT method given in that post, that might help.

spirallingspiral said:
Did you remove the battery and put it back in? And it still goes to download mode? Try starting the phone pressing Volumedown+power key for sometime or you could try Volumeup+Homekey+Power to boot into recovery and try restoring backup or flashing some other rom and see if you can get out of boot. I really don't know why you are getting that connection problem. I got stuck at boot a couple of times and followed exactly what was given in that post and reverted back to stock. I guess some of the senior members will help you here. Meanwhile ill see if i can search a solution for that connection error, i haven't faced that yet so i really don't know the fix. There is a second TOT method given in that post, that might help.
Click to expand...
Click to collapse
Yup, i tried removing the battery. Also tried different key combos to boot but it all goes to the download mode, with the small with box in the middle.
I also tried the option of going straight to the LG mobile support tool (not the LG Flash tool). But the same server connectiom error.
Thanks again for the help.
Hope other members can help me too.

Since I'm not able to do recovery using the KDZ file. Can I use the TOT file?
I have E988 Singapore version, but the last ROM installed was with a CM11. And in the Phone details it shows E980.
Will it work or will it just make things worst?

hd2_droid said:
Since I'm not able to do recovery using the KDZ file. Can I use the TOT file?
I have E988 Singapore version, but the last ROM installed was with a CM11. And in the Phone details it shows E980.
Will it work or will it just make things worst?
Click to expand...
Click to collapse
I haven't flashed using TOT method so i cant comment on that. I heard few people had trouble using flashtool on windows 8, are u you using windows 8? maybe try the kdz method again from a windows 7.

spirallingspiral said:
I haven't flashed using TOT method so i cant comment on that. I heard few people had trouble using flashtool on windows 8, are u you using windows 8? maybe try the kdz method again from a windows 7.
Click to expand...
Click to collapse
Yeah, I read that also. I used a windows 8 pc previously, that might be causong the connection error. I will try my old pc and hopefully it will work.
Thank you!

[Q] LG Optimus G Soft-Bricked? Please help me to recover my phone

Hey Guys,
First post and i already got a problem because i messed up very much
I used to have Cyanogenmod 11 on my Optimus G, but i got several crashes and i wasnt completely fine with it so i wanted to try something new. So i updated my bootloader from CWM to TWRP and wanted to flash Artmod 5.2 Rom. I was a bit fast with my wiping, so i accidentally wiped the whole phone, so that everything was gone: Cyanogenmod, new Artmod rom i wanted to flash just everything.
I read a bit and thought it shouldnt be a problem then to just sideload the new rom, which i tried to do. I used adb sideload to put Artmod on the phone, everything was fine, flashing went through but i got stuck at the LG boot logo at the start of the phone. I waited like 30 minutes and nothing did change, so i thought something was not right.
I then just wanted to go back to cyanogenmod, tried to flash that through the adb sideload procedure but i got an error which said "error executing updater binary in zip 'tmp/sideload.zip'".
I was kinda thinking something really messed up so i tried to revert the phone to stock rom with the correct KDZ file i searched with the tool linked in the FAQ, everything downloaded but when i tried to flash the KDZ it gave me an error like this:
"12:03:59 Launching SW update
12:03:59 Unpacking KDZ
12:05:10 KDZ file extracted
12:05:11 Extract file error
12:05:13
===FINISH===="
So i searched the forums again and noticed that it should be a problem with the KDZ updater tool because the KDZ file was too big to get flashed properly. I wanted to try the LG Flash Tool 2014 then which is provided here in the forums and should work, it extracted the KDZ file, then opened the LG Mobile Support Tool to flash the file on the phone but there i start to get errors again, it either said that i am already on the correct up to date software version or that i need to disconnect the USB cable, remove the battery, insert it again, restart and try again.
I used several tools for that, i even tried it with an offline method that i found in a german forum, but every method got me the same errors, so i couldn't even go back to stock anymore.
I once tried to flash Cyanogenmod then again when i realized that the error message also told me "This Rom is for a "E975", this is a "GEE"" which i did not completely understand because it should be the total same? I edited the Updater-Script in the Zip file of the rom then and removed the part where it checks for that (1st line actually), then the rom did flash properly, phone started to boot (Cyanogenmod Boot Logo was shown) but when the boot was over i got the message:
"Type Password to Decrypt Storage" with a keyboard to enter the password. (I did never set up any password for that).
Now i am completely confused what i can do the recover my phone, either to stock or just to another rom, every method i tried did not work and i dont have any other ideas.
I can go into Fastboot, Recovery and Downloadmode, but when i tried to wipe again in Recovery it says that it cant mount my data mount point (probably because the storage is encrypted).
Somebody told me to do a hard reset with the keys "Volume down and power" which i tired several times, but everything i get is just the Google boot logo and then happens nothing or i get the Google logo, then the LG logo but after that i get stuck again, I cant seem to go into the "Hard Reset" menu which i should get into with that keys.
Anybody can help me what I could try or got a solution for this? I would be very thankful. I don't wanna loose my phone

Astarooth said:
First post and i already got a problem because i messed up very much
Click to expand...
Click to collapse
Don't worry, that's pretty standard scenario for the first post...
I wanted to try the LG Flash Tool 2014 then which is provided here in the forums and should work, it extracted the KDZ file, then opened the LG Mobile Support Tool to flash the file on the phone but there i start to get errors again, it either said that i am already on the correct up to date software version or that i need to disconnect the USB cable, remove the battery, insert it again, restart and try again.
Click to expand...
Click to collapse
Flash Tool 2014 works great for me every time, so try it again. Make sure you disconnect from the Internet before running it (yank out your LAN cable, or disable your WiFi), so it doesn't attempt to connect to LG servers. And don't forget to put your KDZ file in the same directory with the tool. It should go through just fine. That's by far the easiest method to revert back to stock, to get you to a clean starting point.
"This Rom is for a "E975", this is a "GEE"" which i did not completely understand because it should be the total same?
Click to expand...
Click to collapse
Umm... No, they are not the same. E975 is "geehrc", and there is no such OEM ID as "gee". There are many different OG variants. For the cross-reference between the models and OEM IDs, you can look here. Generally, you should stick to the ROMs that are designed for your model, unless you know exactly what you are doing, when trying to flash a ROM from a different platform.

kt-Froggy said:
Don't worry, that's pretty standard scenario for the first post...
Flash Tool 2014 works great for me every time, so try it again. Make sure you disconnect from the Internet before running it (yank out your LAN cable, or disable your WiFi), so it doesn't attempt to connect to LG servers. And don't forget to put your KDZ file in the same directory with the tool. It should go through just fine. That's by far the easiest method to revert back to stock, to get you to a clean starting point.
Umm... No, they are not the same. E975 is "geehrc", and there is no such OEM ID as "gee". There are many different OG variants. For the cross-reference between the models and OEM IDs, you can look here. Generally, you should stick to the ROMs that are designed for your model, unless you know exactly what you are doing, when trying to flash a ROM from a different platform.
Click to expand...
Click to collapse
Well i tried Flash Tool 2014 again and seem to get the same error that wants me to disconnects as it stops at the same position like it always did, also doesn't matter if I am connected to the internet or not, everytime it doesn't run through. This time I couldn't even read the stuff that was written in the LG Mobile Support tool because it only shows "????".
Heres a Screenshot:
The settings i made should be the right ones I think, the phone does get recognized by the computer when i plug it in because of the sound that windows makes.
I clearly dont't know what I can try anymore...
And according to the roms: well i only used roms for the E975, which is exactly my phone model, thats why i was wondering about that error message i got
Artmod is for E975, the CM11 was for E975, i even tried Mokee rom but i always got same error messages...

Nobody got another idea? I really am confused because if i can enter downloadmode and recovery there should be a way to get my phone back working.
Anybody knows where i can get maybe some older KDZ Files to go to 4.1.2 Stock rom and try to flash these?

problem
Astarooth said:
Nobody got another idea? I really am confused because if i can enter downloadmode and recovery there should be a way to get my phone back working.
Anybody knows where i can get maybe some older KDZ Files to go to 4.1.2 Stock rom and try to flash these?
Click to expand...
Click to collapse
Contact me on [email protected] and ill help u over teamwiewer.

Astarooth said:
Well i tried Flash Tool 2014 again and seem to get the same error that wants me to disconnects as it stops at the same position like it always did, also doesn't matter if I am connected to the internet or not, everytime it doesn't run through. This time I couldn't even read the stuff that was written in the LG Mobile Support tool because it only shows "????".
Heres a Screenshot:
The settings i made should be the right ones I think, the phone does get recognized by the computer when i plug it in because of the sound that windows makes.
I clearly dont't know what I can try anymore...
Click to expand...
Click to collapse
I don't know why you are seeing "???", but here is a couple of things regarding the settings, based on your screenshot:
1. Type should be CDMA (yours is 3GQCT).
2. PhoneMode should be DIAG (yours is CS_EMERGENCY).
3. I would suggest using CSE Flash for a full format (you are using Normal Flash).
Remember, this is a hacked tool, so the settings might not make perfect sense, comparing to the original ones. Just try following the instructions in the OP of the Flash Tool 2014 thread. Like I said, works every time for me...

kt-Froggy said:
I don't know why you are seeing "???", but here is a couple of things regarding the settings, based on your screenshot:
1. Type should be CDMA (yours is 3GQCT).
2. PhoneMode should be DIAG (yours is CS_EMERGENCY).
3. I would suggest using CSE Flash for a full format (you are using Normal Flash).
Remember, this is a hacked tool, so the settings might not make perfect sense, comparing to the original ones. Just try following the instructions in the OP of the Flash Tool 2014 thread. Like I said, works every time for me...
Click to expand...
Click to collapse
I don't know why i see "???" also, but it didn't matter
I just tried the settings you told and used CSE Flash which worked out really well.
No i am back to 4.4.2 LG Stock rom. I think the root is gone now, but one thing i wanna ask is if my bootloader is still unlocked and custom recovery is still on it?
Anyway, thank you so so much! I appreciate your help! Thank you!

Astarooth said:
I don't know why i see "???" also, but it didn't matter
I just tried the settings you told and used CSE Flash which worked out really well.
No i am back to 4.4.2 LG Stock rom. I think the root is gone now, but one thing i wanna ask is if my bootloader is still unlocked and custom recovery is still on it?
Click to expand...
Click to collapse
Glad to hear you are back in business. After flashing KDZ, the root is definitely gone, your BL is locked, and the recovery is stock. You will need to do all the necessary steps again: root, unlock the BL and flash custom recovery.

[solved] G4 H815 - What kind of loop I have entered ? TWRP and supersu on marshmallow

I have rooted all my phones.
I was following a tutorial to root my LG and instead of flashing TWRP I was advised to boot TWRP which I did (fastboot boot recovery.img)
Using TWRP in that mode I flased supersu.zip, then phone went into a loop.
Not sure where I ended up
When I enter "adb devices" it shows my G4 as offline.
How can I move from this point please ?

Hi guys?
Any ideas ? Please.

birkopf said:
Hi guys?
Any ideas ? Please.
Click to expand...
Click to collapse
if you can enter download mode vol up connect usb then download corresponding KDZ file and flash with LGUP using the refurbihsed option. good luck

adb offline means you have to accept the popup on the phone when connecting to the phone from that pc. If your screen is not accesible then you have to flash the kdz as mentioned above.
Next time, when you enable the USB debug, also connect to the pc and answer that popup. and you should be good.

Thanks guys
Are you sure I would be able to flash KDZ ?
I flashed supersu.zip without TWRP installed and now when I turn on my phone, LG logo shows up but boot process isn't progressing.
Probably too early for PC to detect mobile and I suspect thtats why it shows offline in adb...
I'm very cautious about guide/how-to I follow now. If you have any links on flashing KDZ that you could share I would appreciate.
Also - what will flashing KDZ do exactly ? Flash new system directly to /system partition ? (just trying understand)

If using LG UP you can choose Upgrade that will only write the system, or choose Refurbish, this will erase /data so you will end up fresh. It depends on what you want.

I am sorry for late reply. Very busy week, and needed to sleep a bit...
Fortunately LGUP is working. I have Uk version of my G4 (exactly H815 unbranded. No more info under battery).
- How can I be sure I am getting correct KZD file?
I'm downloading H81520D_00_0115.kdz but never used those and I don't want to flash wrong one...
I have found also H81520h_00_-516.kdz.
Don't want to be a pest but... if it's a matter of quick google search for you - could you be so kind and drop correct link for me ?
I cannot check anything with phone in this state

birkopf said:
I am sorry for late reply. Very busy week, and needed to sleep a bit...
Fortunately LGUP is working. I have Uk version of my G4 (exactly H815 unbranded. No more info under battery).
- How can I be sure I am getting correct KZD file?
I'm downloading H81520D_00_0115.kdz but never used those and I don't want to flash wrong one...
I have found also H81520h_00_-516.kdz.
Don't want to be a pest but... if it's a matter of quick google search for you - could you be so kind and drop correct link for me ?
I cannot check anything with phone in this state
Click to expand...
Click to collapse
V20h is newer so you should flash that. If you go to general threads section you will see that there is v20l that is even newer than v20h, and is from UK. Happy flashing
Edit: here you go with the link to the new firmware thread http://forum.xda-developers.com/showthread.php?t=3480887

OK, I'm not sure what is the problem here but thanks to your advise I restored system. Everything was working fine. Then I installed TWRP. Then using TWRP I flashed UPDATE-SuperSU-v2.46.zip and then... phone wen to the same loop as it was before.
Could it be some incompatibility of supersu ? Or perhaps I need some kernel or other items. Or perhaps other root manager ?

Ok, found the problem. On Marshmallow flashing supersu will not work - I flashed pre-rooted kernel and works like a charm. Just a shame I had to spend half of my sunday flashing, erasing, backing up, restoring, etc.
Thanks for your help guys!

[Samsung] Galaxy Tab 3 SM-T210 / "Firmware upgrade encountered an issue"

Hello!
Few days ago i found my Samsung Tab 3, and decided to charge it and biit it up.
It got stuck on Samsung logo when i booted it.
So i did a factory reset using the recovery mode.
After i did that the device booted up. with lots of errors.
I was on the setup screen for my device and these errors appeard and said like core has stopped working and every like preinstalled app on my samsung device aswell (NAME has stopped working). So i was not able to fullfill the setup of my device.
I read about it online and a firmware upgrade could fix the problem ( Like the easiest way i read )
So i did some googling and downloaded Odin and a firmware. Followed a guide and did everything right. BUT the process faild like 8min into the flash.
And now my device is stuck on "download mode" but with the error "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again."
I cant get the phone to turn off, nor get into recovery mode or anything else. I tried flash again but no luck.
I also tried another firmware i found. still same problem.
How do i fix this and how can i use my samsung tab 3 again.
WHen i bought it years ago i never really used it. So it's in "new shape" and has never really been used. And now i wanna give it to my little sister for some kids games to play at Xmas.
I hope we can solve this problem.
Thanks in advance
Regards
Timmie

Hyldran0 said:
Hello!
Few days ago i found my Samsung Tab 3, and decided to charge it and biit it up.
It got stuck on Samsung logo when i booted it.
So i did a factory reset using the recovery mode.
After i did that the device booted up. with lots of errors.
I was on the setup screen for my device and these errors appeard and said like core has stopped working and every like preinstalled app on my samsung device aswell (NAME has stopped working). So i was not able to fullfill the setup of my device.
I read about it online and a firmware upgrade could fix the problem ( Like the easiest way i read )
So i did some googling and downloaded Odin and a firmware. Followed a guide and did everything right. BUT the process faild like 8min into the flash.
And now my device is stuck on "download mode" but with the error "Firmware upgrade encountered an issue. Please select recovery mode in Kies & try again."
I cant get the phone to turn off, nor get into recovery mode or anything else. I tried flash again but no luck.
I also tried another firmware i found. still same problem.
How do i fix this and how can i use my samsung tab 3 again.
WHen i bought it years ago i never really used it. So it's in "new shape" and has never really been used. And now i wanna give it to my little sister for some kids games to play at Xmas.
I hope we can solve this problem.
Thanks in advance
Regards
Timmie
Click to expand...
Click to collapse
That depends on various things, such as the Android version, kernel and change ID. Than also the Odin version you've used and/or the settings during the attempt of flashing. I found that using the wrong Odin version on a particular Android version, that may prevent the flash of being successfull. B.t.w, did you format both user and cache partition while trying to reset to factory default?

xdausernl said:
That depends on various things, such as the Android version, kernel and change ID. Than also the Odin version you've used and/or the settings during the attempt of flashing. I found that using the wrong Odin version on a particular Android version, that may prevent the flash of being successfull. B.t.w, did you format both user and cache partition while trying to reset to factory default?
Click to expand...
Click to collapse
Yeah, I've found out what Odin version to use that worked for others. I've downloaded lots of different firmwares and such and tried. ALL fails.
When i did a factory reset i also cleared cash and user.
Now i cant even turn off the damn thing. If i charge it up and start, it just goes directly to the screen where it says "Firmware upgrade encountered an issue" and if i try to turn it off, it just reboots and goes back. And i cant even return to factory reset page.
I think that my Micro-USB cable might not work for this, or is that a thing? Do i need a good cable from PC to Phone for this? Or does any cable work?
I just want this tab to work. been trying for weeks.
Thanks for your reply. I hope we can sort this out.

Hyldran0 said:
Yeah, I've found out what Odin version to use that worked for others. I've downloaded lots of different firmwares and such and tried. ALL fails.
When i did a factory reset i also cleared cash and user.
Now i cant even turn off the damn thing. If i charge it up and start, it just goes directly to the screen where it says "Firmware upgrade encountered an issue" and if i try to turn it off, it just reboots and goes back. And i cant even return to factory reset page.
I think that my Micro-USB cable might not work for this, or is that a thing? Do i need a good cable from PC to Phone for this? Or does any cable work?
I just want this tab to work. been trying for weeks.
Thanks for your reply. I hope we can sort this out.
Click to expand...
Click to collapse
It is quite easy to turn the device off, for that to happen you have to press and hold the on/off button. You'll see that the device will shutdown and try to reboot and then finally shuts down again and stay off, then release the on/off button.
Are you sure trying to flash the correct firmware with correct changes, etc??
Please share with us the device and Android version, as well as the stock ROM version with changes you're trying to flash.
Put (copy and paste) the output of Odin below.
Another way to get the firmware flashed is by using Heimdall, but for that to happen you first need to rename the extension of the stock ROM (remove .md5 and leave .tar) and than extract all seperate pieces that are contained within the stock ROM.
All those extracted pieces from the stock ROM you have to upload seperately onto Heimdall and try to flash them to your tablet, one by one.
Heimdall you'll find 'here' or use FWUL instead which has Heimdall pre installed, download is to be found 'here' and install it on a USB medium a stick, to put FWUL onto USB, use Balena-Etcher and the download is to be found 'here'.
Micro USB cable does work, but if you're unsure, try another one and make sure using the correct drivers too.
Using Odin, make sure the tablet is recognised and 'connected' in Odin, also make sure 'repartitioning' is unchecked.
If you've used the wrong Odin version, flashing will fail!

You have Discord by any chance?
If so, please add me @Hyldran0#8832
Thank you for you time man!

Hyldran0 said:
You have Discord by any chance?
If so, please add me @Hyldran0#8832
Thank you for you time man!
Click to expand...
Click to collapse
You're welcome.

Hi, complete novice here, does anyone know where I can get a working Firmware for my Tab 3 v7 (SM-210)?
I have searched through various forum articles here, and tried to install with several builds but none will install. The only one that gets anywhere near is the JASBR build by gr8nole. It appears to install, but on restart, the TAB just sits on the "Samsung Tab3" start screen.
I read that I may need to flash the firmware 4.4.4 (Kit Kat), but can't find it!
The unit is not totally bricked (yet), as I can run TWRP 2.8, with which I created a backup of the original build, but when I try to restore the backup, it fails at just over 31%.
Can anyone help please?

Help Needed - Bricked

Before I get going - yes I know I messed up. I do have plenty of experience flashing ROMs etc, albeit I'm absolutely not an expert. This was purely a not thinking moment.
So I flashed my Samsung Tab S4 with Kali Nethunter a while back, not really used the tab since. Without a great deal of thought, I decided to put the device back to factory. I went back into the OS and flicked the OEM toggle - utter braindead move. Obviously the device now comes up with a warning, the exact wording is:
"Security Error: This device has been flashed with unauthorized software & is locked. Call your mobile operator for additional support. Please note that repair / return for this issue may have additional cost"
I can still access download mode.
Right, now you've finished laughing/cussing me I did some digging and apparently I can still flash with Odin if its the official ROM? I went to SAMMobile and downloaded the latest ROM and Odin fails with a write error.
What I need to know is:
How bad have I messed up?
Is this recoverable?
Any help appreciated.

Hello there,
So yes, pretty bad mistake but these things happen but it should be recoverable. Just follow the link to get your device booted up! Hopefully the link is for your variant, if not look into installing twrp recovery for your device. Once installed you can back up your data and flash the rom compatible using twrp. Then set up the device and restore your data but make sure it's unlocked or your error may repeat itself! Also you have to find the right version of Odin, they do vary some are patched. Have fun!!
Recovery

Hi,
Thanks for the reply Jedi.
It already has TWRP on it, but recovery is inaccessible since I turned the OEM lock back on. The only thing I can now access is download mode but it can't seem to write to it, which I'm guessing is because the OEM lock is back on. I thought I might still be able to write the official Samsung ROMs even with the OEM lock but it doesnt seem like its the case. Obviously no access to ADB to do a Fastboot unlock either. Fresh out of ideas.
Any other solutions?

bump - anyone? lol, really not looking for an expensive door stop.

It seems you're at the dead end. However, there might be a solution for this, not sure though does it work. But go to OnePlus forum and you'll find how to recover from bricked device. You still got hope because of TWRP. good luck bro

OK, so for anyone wondering if this is fixable, the answer is YES!
You can flash the standard ROM even with the bootloader locked. Clearly what I downloaded from SAMMobile wasnt compatible, however when I used Frija, it found and downloaded the correct ROMs.
Another sticking point of this was the infamous USB 2.0 issue, I assumed the ROM was failing again, however when I finally could be arsed to try it on my old PC, its worked like a charm.
So there you have it:
Latest version of Odin
Latest Samsung USB drivers
Latest ROM downloaded from Frija
Put the tablet into download mode and flash away.