Develop Bugs

[Q] Can't do recovery?

I just tried installing cm-10.0.0-epicmtd on my Epic 4g. I followed the instructions I used for when I installed cm9 and everything was going fine till it rebooted and is now stuck at this stage
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It's been 30 mins, I pull the battery out, try to get in download/recovery mode and nothing will happen. Won't even charge properly or connect to the computer. I've looked at this link but it requires having it connect to a computer.
http://forum.xda-developers.com/showthread.php?p=13245831
What the hell happened to my phone and what can I do to fix it? I don't care if the whole thing is factory reset.
Edit: Finally got it to respond to download mode. Now trying to restore it to FC09

Make sure you have a good cable and use the PIT file.

Flashing failed, white screen. Can't go back to kit kat

so I tried to flash Leaner Lollipop that gibz (i think) provided and got white screen after flashing. I turned off my phone somehow, downloaded stock firmware (4.4.4) and tried to flash that but didnt work. When I press download and plug in the phone, I would get error 2004, and phone would just start charging and boot up. please someone help me quickly. Phone is 820us dual sim

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up there is what the screen looks like, and down is screenshot i took, connected phone to pc and downloaded.

Screen Mirroring is all greyed out

OK Heres my problem and I am wondering what Bright mind here on XDA can help me fix this:
I have a Galaxy S3 (AT&T) and I have stock but rooted Android 4.4.2 with a kernel version of 3.4.0-1514807 and My Screen Mirroring is all greyed out, unable to do anything.
I would like to know how to get this back to working condition again. Please don't suggest Apps. Most of the Screen mirroring apps ive tried are either Ad ridden or they do not work. I just want my regular phone functions to work as intended.
And if it has anything to do with this I no longer have Samsung Knox. It went away when I rooted my device.
Here is a screenshot of what is the problem:
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Anyone?

Mi MIX 2 bootloop and can't flash TWRP

Hello everybody,
I've been lurking around here for quite some time now and just registered because I am not getting my phone running anymore.
I used the MIUI rom and wanted to put it back to factory settings.
Unfortunately it's stuck in a bootloop now, it keeps restarting after chosing the language and the country (China only option).
Whenever i want to flash TWRP or OrangeFox, I get the erros from the picture below.
It somehow crashes and I need to close the Powershell Window.
I tried several different USB Ports and USB cables.
Thank you!
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Can anyone help me pls? Stuck on bootloader, No OS

I forgot already everything about flashing and haven't used this device for 2 years, but wanted to revive this one now. My phone is stuck on logo but it has still the twrp recovery but it says there No OS and device was not root. Can anyone help me give steps on what to do? As far as I remember, I had hard time reviving this one before but had given up so it was not used for 2 years. My device is a korean variant. Pleaseeee! See attached picture for few details that I can and only know to provide.
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Photo is not loading
Here is a gdrive link for the pic sorry.
https://drive.google.com/file/d/1KMY3NYjJHpvk1T65NOcazmxV9A5qFc8f/view?usp=sharing

Inactive forum?