Over the past week or so I was having some issues with FSX FSX Steam and FSX2009 the problem started out with flickering images in the background. I had chalked it up as some bad scenery and never looked into it what might be causing it. I was also having texture problems with some aircraft the best one I had was an invisible AI aircraft all you could see was a shadow. There were also some occasions when I could not see all of my aircraft while in spot view. A few days ago I was flying a flight when I heard a sound your system will make when you unplug a USB device. I thought that was odd since I had not unplugged any thing. So I paused the flight and opened up the device manager and noticed that several of my USB device had the Yellow triangle on them which means something is wrong. So I tried to restart my system which should clear that up. After shutting down my system just set there and did nothing the fans were still running as were the lights on them but my monitor showed nothing and I noticed I had no hard drive light blinking showing that the drive was running. I could not get my system to start no matter what I tried so I let it set for awhile and tried again and it came up with no problems. So i checked the device manager to see if my USB devices still had issues and none were found. I was not sure what was going on when I noticed my mouse or key board did not work, they are both wireless and the transmitter plugs into a USB port. I could not even use crtl shift delete to reset the system with I had to hold the power switch to reset my system and sure enough it would not come back up so I was thinking this could be two things a power supply problem or a Motherboard problem. After doing some research I figured that the power supply had some issues so I bought a new one and crossed my fingers and toes hoping this would solve the problem. I installed the new power supply Wednesday night and turned it on the system came up and than I opened FSX to see if there were any issues. I could not believe my eyes the image was sharp and clear no more blinking images in the background at all. It just goes to show that there is a reason things do not work right. Apparently my power supply was having some power issues my Video card uses a 12 volt rail for power and it was not getting enough power or current which is what was causing the blinking images and other texture problems I was having as well.
Bottom line here is one to needs to stop and find out why something that used to work without problems start having issues.