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02-08-2012, 08:07 PM   #1
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K20D won't turn on due to card door (?)

It started acting after I reinserted the card this morning. Taking off and putting back in the battery would start it but only if there was no card. Several cycles later it is not starting anymore, when turned on the battery symbol flashes on the top lcd for a second (or less if no card) then die. This happens without a card so I can discard that. I also tried a second, fully charged battery, without success. As I'm sure I'll be asked how I treat it - I bought it new and while I take good care of it, I don't back off from using it in rain, even blizzard; no falls or bumps though. Last weekend it accompanied me in a ski mountaineering outing and experienced some temperature variations but it performed just fine including afterwards.
I'm hoping someone else has seen this and maybe has a solution. I have no problem sending it to Cris for repair, but five bleak weeks without my trusty camera is a long time, even for this season. Many thanks for any suggestion.

02-08-2012, 08:15 PM   #2
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I had this happen to me when I left the card door open by accident. The battery indicator would flash on and disappear. I panicked for a minute before I realized what was going on. Once I closed the door the problem went away. So it definitely has to do with the card door.

My theory: some sort of contact between the door and body is not functioning properly and the camera thinks the door is open. I have no idea how to fix it beyond sending it in.

02-09-2012, 04:45 AM   #3
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In some of the older models, the door-open detection can be disabled from the debug menu. No idead if this includes the K20D, but it may be worth a try.
02-09-2012, 01:37 PM   #4
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Original Poster

I found the microswitch that's responsible for card door close signal. It's on the right of the clutch mechanism as seen from above, and the door steps on. After messing a bit with it, cleaning it with a brush and air blower, now it seems to be stuck on closed state and camera boots even with an open card door... Sadly this is not the end of it: while the camera starts and operates fine except it keeps displaying a card error message. Needless to say it happens with any card so there must be more than just a defective door contact. Today I'll pack it up and send it over to repairs.


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