Canon 600D. Screen is blank when turned on. LED blinks once on startup.

Started by veeman, March 04, 2016, 04:36:57 AM

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veeman

My Problem: Camera does not turn on. When camera is turned on, the red led blinks once. It seems to be some sort of issue loading the firmware. Hopefully will not have to replace the motherboard as all the hardware seems to be functional.
My issue is almost exactly the same as this person's: http://www.magiclantern.fm/forum/index.php?topic=16487.0

My attempts at solving the problem:

  • Try starting camera with no sd card: LED does not blink at all. Screen does not turn on. No signs of life
  • Try starting camera with different ML card: LED blinks once but otherwise nothing happens.
  • Run the Magic Lantern Rescue utility: http://i.imgur.com/IupUgPx.jpg?1
  • Run the LED Blink test: LED blinks repeatedly indicating that camera is alive and loads bootloader

What I was doing before problems started: I was viewing images in the camera gallery when the camera suddenly started freezing up and the led started blinking rapidly. I shut off the camera and upon turning it back on, it was behaving normally. Now a week later, the camera is refusing to turn on.

Thanks in advance for any help.

a1ex

Do you still have a backup copy of the ROM on one of your cards? It should be under ML/LOGS.

I hope we'll not actually have to reflash the ROM, but this step is just in case (for example, if we make a mistake when troubleshooting).

veeman

Thanks for your help, Alex. Unfortunately I formatted both cards in hope that updating the ML firmware on the card would fix it. I didn't think to make a backup.  :(

a1ex

Okay, we'll try to diagnose without it.

Can you run this test? http://www.magiclantern.fm/forum/index.php?topic=16534

Send me the ROM files privately. We also need another 600D user to confirm the dumper is actually working.

Danne


veeman

@a1ex
PM sent with ROM0.bin. Unfortunately ROM Dumper is stuck on dumping ROM1.bin.

@Danne
Thank you for the help!

a1ex

That means, it didn't work.

I uploaded a newer version (same link), can you try again? It's much slower this time (5-10 minutes per file).

veeman

@a1ex
The newest version of the ROM Dumper works perfectly on the 600D. I've PM'd you the ROM0 and ROM1 files. Thanks.

a1ex

I'm getting close to being able to emulate the 600D firmware in QEMU; please remind me once this will be ready.

Watch this thread for progress.