I test now the binary.
when i prepare my 4 gb card with card tricks for boot(i reformat it before, to remove the old dump firmware script), and install the zip archive, and i insert the card in camera and switch on, nothing happens.
also when i remove the Card and switch on nothing happen.
only when i remove the battery for 5-10 sec and switch on without Card, then Camera work as before.
Have you a idea what problem ?
I see no light flickering etc.
Edit:
I notice when i remove the write protect on Card, the camera work as before.
>Load it in play mode -> menu -> firmware update.....
I dont understand what you mean, i use the chdk install instructions from here
http://chdk.wikia.com/wiki/CHDK_for_Dummies