Magic Lantern Forum

Using Magic Lantern => General Help Q&A => Camera Emergency Department => Topic started by: veeman on March 04, 2016, 04:36:57 AM

Title: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: veeman on March 04, 2016, 04:36:57 AM
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:

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.
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: a1ex on March 04, 2016, 08:16:05 AM
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).
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: veeman on March 04, 2016, 04:05:02 PM
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.  :(
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: a1ex on March 04, 2016, 07:04:20 PM
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.
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: Danne on March 04, 2016, 08:18:11 PM
Got 600D at work. Can check whatever you need on monday.
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: veeman on March 04, 2016, 11:08:07 PM
@a1ex
PM sent with ROM0.bin. Unfortunately ROM Dumper is stuck on dumping ROM1.bin.

@Danne
Thank you for the help!
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: a1ex on March 05, 2016, 12:28:25 AM
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).
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: veeman on March 05, 2016, 02:06:53 AM
@a1ex
The newest version of the ROM Dumper works perfectly on the 600D. I've PM'd you the ROM0 and ROM1 files. Thanks.
Title: Re: Canon 600D. Screen is blank when turned on. LED blinks once on startup.
Post by: a1ex on June 29, 2016, 12:37:56 PM
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 (http://magiclantern.fm/forum/index.php?topic=2864.msg168603#msg168603) for progress.