Desktop came with pre-installed mouse/keyboard. Been working fine for several years. Yesterday the mouse began turning itself off. Completed all troubleshooting recommendations - no joy. Cannot find where the dongle is so I can replace the mouse/keyboard set.
Sorry, yes it is an all in one nothing external resembling a USB dongle; just open ports (USB 2 on the monitor 2 on the stand). Batteries changed and both keyboard/mouse re-paired. Keyboard works all the time. Mouse turns on works for about 5 minutes then shuts down. Have to turn off then on again and the same pattern over and over. Mouse is HP with on/off switch and blue connect button.