I've had FS9 installed since it came out last year. I've had no problems until recently even after patching it to FS9.1, and I was wondering if anyone could help. By the way, I've searched through most of the messages here and couldn't find one related to mine.The problem is that on five days ago, I had to replace my video card, as my previous one quit on me. After installing it (a Leadtek FX5700LE), I still could run FS9 without problems.However, three days later on Thursday, out of the blue, FS9 started to CTD for no apparent reason. I could start the program, but once I went to choose an aircraft to fly, it would CTD. The crashing did seem to coincide with my updating Captainsim 707, but I doubt it. The update seemed to install fine.I figured that I should uninstall FS9 and reinstall to get rid of the problem. I reinstalled and added the FS9.1 update. I could boot up the program and fly any of the default aircraft, but after installing a payware aircraft, when I went to choose the payware aircraft, I would get either a CTD or a BSOD. In fact, I'm getting more and more BSODs (which I also got, more infrequently, however, before I changed video cards.Of course, I don't have CTDs with any other program I have on the computer, including Rome: Total War or IL2:AEP. I do experience some BSODs, though, seemingly at random times or perhaps when the computer is being stressed somehow (installation of video drivers, for example).Can anyone give me a hint as to what my problem is? I can't fly any of my payware aircraft (and I have a lot). I'm taking the computer to the shop on MOnday; what should I be looking for?Thanks for any help in advance,Joel Murray

Run memtest 86 to check the RAM. Also try (if you have access to one ) another video card.Check/update if neccessary the chipset (motherboard) drivers.Dave

I would make sure your fs9.cfg is recognizing the new video card. If you are unsure, rename fs9.cfg to fs9.OLD, restart FS2004, let it stabilize, and check to see what video card is listed under the Hardware tab of the Display menu. If it is different than in the old fs9.cfg and the problem is corrected, then use the new fs9.cfg. You will have to reset your preferences.Another thing to try is renaming display.cfg in the flight simulator 9 folder to display.NEW. Copy display.xxx.cfg from the flight simulator 9BACKUP folder and place the copy in the flight simulator 9 folder. Rename display.xxx.cfg to display.cfg. Restart FS2004 and see if the problem is corrected. If so, you can continue to use the old display.cfg file or determine what the changes are between the old and new display.cfg file for your video card.Have you tried running the directx diagnostic to see if the video card is passing the Directdraw and Direct3d tests? If not, press Start, Run..., type dxdiag, OK.W. Sieffert

I had a very similar problem after installing a new video card - yes, a Leadtek FX5700LE. I didn't get CTD's or BSOD's. System just dropped right out, as if I had hit the power switch, although the cooling fans and hard drives were still running.Turned out the problem was the power supply. New 520 watt PS, problems gone. Old PS works just fine, in another system that doesn't have quite so many components in it.If you're going to take the system into the shop, get them to check this, before you throw more money at the problem without being sure.Cheers,Doug Dawson

Thanks for the suggestions, everyone.Some additional info: I was getting BSODs before I changed video cards, but just less frequently. Now, I'm getting BSODs even when doing something like installing software--and it doesn't matter what I'm installing: I've had BSODs interrupt the installation of FS 2004, NVidia drivers, and others.Of course, I still have the problem with FS 2004: CTD when selecting a payware add-on aircraft.By the way, I've tried running memtest86 and haven't seen any problems with my memory yet.When I take the computer into the shop tomorrow, I'm going to ask about a more powerful power supply (mine is a 300W max, I think).Thanks again, everyone.Cheers!Joel Murray

Just an update:Went to the shop, had a 400W power supply installed plus another fan to keep the tower cool (it was getting hot) and had another 512 meg RAM added to a total of 1 gig of RAM.Everything worked fine at the shop. In fact, they could not reproduce any BSODs. I was happy, I took my CPU home, plugged it in, and BANG: BSOD!I phoned the shop, which recommended plugging the computer into a UPS, so I went out and bought an APC 350W. Plugged everything into the UPS, and long story short: no more problems.What a weird experience! I guess the electricity from the outlet to the computer had degraded somewhat (spikes? undervoltages? overvoltages?), possibly because I have a number of things hanging off the outlet. Anyway, the UPS seems to have solved the problem...Cheers, and thanks for the suggestions,Joel Murray