T3I Corrupted SD Card and Camera wont Turn on.

[NazariyM]

I have tried on at least 4 batteries to turn on the camera and have fully charged them all four but no success.
When i turn on the camera:
- No Red Light
- No Shutter Sound
- Nothing Happens/Only thing that can be done is turn the dial or switch on/off.
Suggestions on what I should try to bring it back to life.
I took the camera and tried to put the sd card into windows 8 but it wouldnt get detected. Then, I plugged it into my other computer that runs windows 7, the card shows but as corrupted and needs to be reformated.

[NazariyM]

I tried to connect the canon to my PC, nothing happens no dialogs popup. Not even in My Computer...

[NazariyM]

Might have been the magic lantern that hasn't been properly installed but I had installed it before and it worked flawlessly but before the camera died, the screen was flipped over upside down...
Could the internal connectors be an issue?

[Walter Schulz]

Remove battery, remove card. Remove accessories (if any). Make sure battery is okay.
Insert battery, *don't* insert card, close compartment doors.
Startup cam.
Report results.

[NazariyM]

I tried that method before but ill try it again...I got these Batteries last year, around September...Okay I tried a different battery turned on without sd card but when I inserted the corrupted sd card, the camera wont turn on. But when i let the electricity flow out...and put the battery back it works...just the boot file is cached on the corrupted card which prevents the camera from booting...
Is their a way i could fix the corrupted SD card?
I appreciate your help it is very helpful, I read reports of these issues but none of them seemed to work until now...most likely because i tried to use a different battery, threw that one away.
P.S: I might have thrown out the good battery on accident and kept the bad one.

[Walter Schulz]

Format card in cardreader.
Format card in cam.
Make card bootable using Macboot/EOScard.
Delete all contents from card.
Copy extracted nightly build contents to card.
Insert card into cam and startup.
Report results.

[NazariyM]

The card isn't detectable on windows 8.
I guess there is no use of it anymore, ill just get a new one. I have another sd card...camera seems to operate, in a good way except the display is flipped(upside down).