"One of four lens covers doesn't open all the way"に関する回答It's usually something sticky or dirt on the lens cover shutter. you should be able to clean it or use a very light lubricant on it. Be careful not to get any on the glass lens.
"Why wont my lens open?"に関する回答The plastic gears for the lens are damaged and probably nor repairable. Lens assembly replacement required. Quite expensive.