Droid says not to turn off target but nothing happens

[jjs211]

Samsung Galaxy Tab Pro 8.4 has the following message:
Could not do normal boot.
Ddi : mmc_read failed
Product name: SM-T320
Etc.etc. ..........
UDC Start

Droid Icon center on screen and has "Downloading… Do not turn off target!!" below it.

It has been hours. What should I do? Wait forever? What if I try to reboot?

 

[lunatic59]

That's simply a message that you have it in download mode and it's waiting for input from Odin. If you try and reboot, it will probably bootloop back to the same screen. You might try fixing it with Samsung's smart switch emergency recovery.

 

[Milo Willamson]

Odin google your model number, find exact softwear to your phone. Took me two solid weeks on getting the right number for my old Droid Turbo. Turst me, you honestly do not want to shut it down just yet, it will be quick when you get it to Odin, a few clicks and it should be okay.

 

[jjs211]

Thank you all for helping. Mine is back alive. So much to learn about android.

 

[lunatic59]

Glad you got it working. Did you have to flash anything or was it simply a boot glitch?

 

[aio developers]

Thank you all for helping. Mine is back alive. So much to learn about android.

YEP many things to learn

 

[Milo Willamson]

Thank you all for helping. Mine is back alive. So much to learn about android.

Welcome and it saves you a bit of headaches

 

[svim]

Since you're up and running normally again this is after-the-fact and mostly out of curiosity but were you actually attempting to do some kind of maintenance/administrative task in particular or did this just happen spontaneously?

t would be odd if your Tab started up in its Download Mode on its own. typically you need to start it up while simultaneously holding down the Volume Down, the Home, and the Power buttons. See below:
https://www.hardreset.info/devices/samsung/samsung-t320-galaxy-tabpro-84-wifi/download-mode/

 

[Milo Willamson]

Since you're up and running normally again this is after-the-fact and mostly out of curiosity but were you actually attempting to do some kind of maintenance/administrative task in particular or did this just happen spontaneously?

t would be odd if your Tab started up in its Download Mode on its own. typically you need to start it up while simultaneously holding down the Volume Down, the Home, and the Power buttons. See below:
https://www.hardreset.info/devices/samsung/samsung-t320-galaxy-tabpro-84-wifi/download-mode/

Yeah really why would they tampered with that stuff?

 

[jjs211]

In my case the tablet rebooted normally. I believe I lost power and received the message before it really started the downloading process (I had started charging the tablet due to low battery and soon afterward switched power strip the charger was plugged in right before I noticed the message on the screen). I wasn't doing any downloading/upgrading. Samsung never provided any upgrade to this tablet. It still runs android 4.4.2; most current apps won't even install on this tablet.

 

[svim]

As long as it's running OK now perhaps that was just some odd, one-off glitch that prompted it to boot up into its Download Mode. Just be sure if there's anything saved on it that you've got all your data safely backed up in case there is some underlying problem.
Download Mode is typically something that's needed for a specific task, but it is a common issue for a Samsung device to reboot itself into its Download Mode when the Android OS gets corrupted in some way. But again, it could have been just a one time thing. If it does happen again though, that does indicate a problem.

 

[jjs211]

You experts are so right. It booted into download mode repeatedly this morning. Was able to boot normally just now and had it all backed up. Waiting for the worst (hardware problem?).
Will flashing a new ROM help? Does anyone know of a link that has detail instructions to root the tablet and flash a ROM?

 

[lunatic59]

This seemingly random bootloop and then being able to boot normally would indicate to me that part of the memory is failing. Some days it works, others it doesn't, but eventually it will fail and then no amount of flashing will be able to fix it.

 

[svim]

Well, flashing the ROM will fix an issue if the operating system is corrupt. But if it's a hardware problem, time to start shopping around for a replacement.

But to flash a stock ROM go here and select the ROM that matches your country and carrier:
https://updato.com/firmware-archive-select-model?exact=1&q=SM-T320
Be sure to select the appropriate one, ROMs are not interchangeable
For detailed instructions on the process go here:
https://updato.com/how-to/how-to-install-an-official-samsung-stock-firmware-using-odin
This process does involve using a Windows PC.