Time Machine will not back up after Mac repaired
My Mac just had a major repair (video card & logic board replaced) Now I am finding I am having to re-register programs, redo settings etc. But in the case of Time Machine, it will not back up my computer any more after the repair. When I look at the Preferences it always gives me some time in the next 1/2 hour, but never does it. When I Control-Click Time Machine and choose "Back Up Now" nothing happens. I really would like it to work. I had a major problem before & relied on Carbonite & lost a bunch of stuff. Time Machine saved me a lot of grief when my Mac broke down this time.
mac pro, Mac OS X (10.5.8)