Press MENU; Display/LCD on/off; Image size/Delete buttons simultaneously while turning on camera.
Just had the identical problem after almost exactly a year - which seems to be the common time period for this problem! Found this on an Amazon review and it seems to work (for the time being)!:
" Jacobe's solution is to reset by pressing all 3 buttons on the back of the camera(MENU; Display/LCD on/off; Image size/Delete) simultaneously while turning on the camera. This is a workable but short-term solution as the camera, with its integral flaw, will continue to "excite" with the unpredictable white screens of death."
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