Short version overview: Computer stopped being able to complete the start process. It now works fine after doing a system restore, but not in the basement office where it belongs. It works only on my testing bench where the mouse, keyboard, and monitor are different. (I took the power cord from the other room and tried three others - all work upstairs.) The next thing we'll try is using the same mouse, etc., but I'm looking for other ideas since I don't think those things should make such a difference.
It's a Dell Inspiron with dual boot -- Ubuntu and Windows 7.
Details: I usually see a menu of boot options. Right before that happens, the Dell logo appears and text appears in the upper right of the screen indicating I can press F12 for boot options. I don't need to do that because it goes to the boot options automatically -- until three days ago. (The default is Ubuntu if I don't select Windows.) It's a few months old and seemed fine until now. It stops going past the screen with "Dell" and the "press F12". It makes the initial start-up noises and one light on the front blinks as if accessing the system, then it stops and goes quiet, leaving the logo and text on the screen. It does not go as far as having the active status bar at the bottom of the screen -- but it does have the rectangle outlined without a color inside as it should have.
I took it to my other office and had the same problem at first. (My memory is fuzzy on this, but I think it did the same thing). I tried using a rescue boot disk -- it started normally. Nothing wrong on the memory diagnostics. I did a system restore to a few days prior to a time it was working well. The new event was a critical Windows update, so it's rolled back to before that. On my testing bench, it starts normally. Put it back downstairs -- never gets past the first screen.
The differences between working and nonworking conditions are the power source and various devices plugged in. Those in the basement office did not change between it working and not working. Power comes from a heavy-duty extension cord since there are no outlets in that part of the basement. All of the other equipment using that cord work fine. We unplugged everything from the power strip (surge protector) and left only the computer, but that didn't make a difference. Tried a simple power strip too.
Edited by hamluis, 02 December 2014 - 10:15 AM.
Moved from Win 7 to Internal Hardware - Hamluis.