I think I might have figured something out about the shutter bug. For me it's also a workaround.
First, here's my camera behavior on powerup.
1. Press powerbutton
2. four-five rapid green flashes, then 14-15 amber flashes
3. LCD comes on
4. one quick amber flash
4. Half-press shutter button and get focus, full press and nothing happens - AKA "shutter bug"
5. press powerbutton. LCD goes off and
6a. one quick amber flash,
6b. a couple seconds later, another long flash after the "Sensor cleaning" icon disappears
7. camera is off.
BUT, if I press the power button a second time between 6a and 6b - basically right after I turn it off, turn it back on again, then I get about 20 quick green flashes (or sometimes just a long pause until the LCD comes back on) and I can take a picture EVERY TIME. In other words,
with the shutterbug, here's what I have to do to take a picture:1. Press powerbutton
2. four-five rapid green flashes, then 14-15 amber flashes
3. LCD comes on
4. one quick amber flash
5. press powerbutton
6a. one quick amber flash,
7. quickly press the powerbutton again (like 0.5 seconds or so - if there's a second amber flash it's too late)
8. about 20 quick green flashes (or sometimes just a long pause)
9. LCD comes on again
10. happily take pictures
If I powercycle normally, I used to think that I had about a 20% chance of a working shutter. But now that I've been watching the LEDs, if I wait for the long orange light at the end, so far I've powercycled a dozen times and had the shutter bug every time. Conversely, the quick off/on cycle after initial powerup has worked the last
dozen twenty times too.
I installed magiclantern from these two files:
http://ml.bot-fly.com/EOSM1202.FIRhttp://ml.bot-fly.com/magiclantern-v2.3.NEXT.2013Sep17.EOSM202.zipI have the 18-55 mm lens, camera fw 2.02, lens fw 2.00 (never upgraded, my camera came with 2.02). ML on a Transcend SDHC Class 10 32 GB card
Here's a question for folks with the 18-55mm lens and no shutter bug - when you initially power up, do you see the green and amber lights rapidly flashing, or only green? Are the other light sequences the same?