This refurbished model has a lot of tempermental issues. I find it difficult to reboot or boot up if it has been asleep for a day or two. The connection with the monitor is intact, however, the computer does not boot up when turning it on and off via the main power button. It has to be done several times and I have to unplug and plug in the inputs before it finally boots up again. Also, the mouse connection for some reason is very fidgity and unstable.