E:91:01

easily just reset the camera with a pencil.

This E:91:01 indicate that the camera flash function is faulty.you need to replace the faulty flash unit. to get away the E:91:01 flashes on screen , what you can do is to do a factory reset follow by turning off the flash function.the screen will not show the E:91:01 and you can use the camera without flash function.hope it help.

There is no flash, not good photo get it. The best solution is E:91:01 is disappear from the screen and camera can flash.

SONY DSC-W55 flash error E:91:01
well i had the same problem, and i tryed everything, even opening the camera and see if any visible damage on any part (nothing), so when i try initializing again ( menu>setup>option #1), right after the "ok" over new reseated date, i went to the flash button and turn it off, and at least the annoying flashing error is not there - that means it is software error, because all flash functions work till it detects that has an error wile charging/loading the flash.
Hope it helps.
TENFERRE

getting not good image or not getting color in video how can i reset my sony DSC-T10 super steady shot. there is no reset button in camera