Or you can go down the long road
I was on the long way before. But did not boot to sd from Android tv. Black screen it was for minute or two, so i will try again now with krescue.
Krescue will cause issues with updates and some features not working, please don’t recommend this @kostaman, best way is to install Android via USB burning tool and then just install CE onto an SD as normal.
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Burn CorElec on sd and just boot to sd from Atv? Then CorElec will finish installation on sd?? That is it??
DO NOT USE ANY CoreELEC IMAGES Via Krescue.
Only use Official CoreELEC Images from our download sources.
Burn to SD Card and insert into Vim.
It should boot to CE .
If it boots into ATV you can long press the remote power button
Choose boot to other OS .
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@jaffac yes, exactly that.
VIM3L works the same way any other android TV box does, install Android to eMMC and just hold the recovery button on the first boot to get CE booting from SD.
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Thanks to you two. You are realy big help from start of my sbc life. I will try this and give feedback first thing tomorrow. Thanks again.
Just want to clarify it is safe to use Krescue for installing ATV roms to eMMC
and they will not interfere with OFFICIAL CoreELEC images installed to SD Card.
Just had contact with Adam and he thought i was advising to install CE using Krescue.
You’re good to go with either long or short methods.
If you try Amlogic burning tool you may have issues with the Vim showing up in Windows 10.
I tried and failed so i used Burn Card Maker which worked.
I did it with Amlogic burning tool before. And with etcher burn CoreElec latest stabile to sd. In Atv with power button go to boot from sd, and have black screen for some time. Switch of and revert all back to CoreElec internal. Everything was done like it should in this first time. So i will try again and wait for some more. Or try with buttons on vim3l. And we shall se.
Use button.
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Hm. Fail again. Maybe is something with superceleron android tv. I use userdebug version. And latest stabile CoreElec on sd. But still got black screen when trying to boot to sd.
I use exactly the same set up on Vim3L & Vim3 so there is something wrong with the
SD Card CE you have prepared.
Check the device tree sm1_s905d3_khadas_vim3l has been copied to the root of the SD Card and renamed to dtb.img
Pretty much explained HERE
Tried sd with CoreElec when on internal was also CoreElec. That time sd installation started correctly.
After you burn the image on your PC
You have to open the device tree Folder on the Sd Card
Copy the sm1_s905d3_khadas_vim3l
Paste it to the Root of the SD Card
Rename it to dtb.img
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Pff. I will do that 
Sorry for all trouble. My fault.
I just though dtb implemented automatic when burning sd.
Hmm, how could that be done…, one image for more than 20 different boxes/dtbs ? That would be a real magic touch 
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Yeah. Silly me.
I will do it now right way.
Done it successfully now. Thanks everybody.