I got this error on my beloved P50 three years ago (in 2002) and gave up trying to fix it. Eventually, I bought a new camera. Today, just for grins, I googled the error and found this page. I followed the whack method first whacking with my hand, then holding the camera firmly and hitting the base flat against a soft cover book. The first whack did nothing. The second caused the disply to go blank. When I turned it on again, I got a 'boot' screen and then the camera started to function normally! Wow! I thought I'd deep sixed the camera for good. Thanks to everyone in this forum for helping me out. This made my day!

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