screen shot not working
I have a MBP (late 2008) with OS X 10.9.5, and about a month ago the ability to take a screen shot stopped working. (Yes, Grab still works, but i wish I still hadthe convenience of using the screen shot keyboard shortcuts. )
Using cmd+shift+3, doesn't do anything (no sound, no new file to desktop [i've even searched the computer for a new file with "Screen Shot" as the name, and there is none]), nor does cmd shift 4, cmd ctrl **** 3, cmd ctrl **** 4, do anything.
I have checked the system preferences for the keyboard shortcuts, and all are selected for screen shots.
I have dropbox, but have unchecked the screenshot sharing option, and I am currently not running dropbox.
I have tried the terminal prompt suggestions in other threads (eg: "defaults write com.apple.screencapture location ~/Desktop", "killall SystemUIServer")
I have attempted restarting the computer.
I have ensured that the software is up to date.
Any help or suggestions to help restore the ability to take screenshots would be appreciated.