Worth to repair a 2 year old Dimension 9200

I've got my Dimension 9200 in Feb 2007. In the meantime I also added components to enable bluray movies: Q6600 4-core Processor 2,4GHz ATI 4850 Display with 512 MB RAM LG bluray/HD-DVD Combo drive It runned perfect. But 4 Days ago the Dimension startet crashing periodically and it looks very like a HW-Problem: Sudden reboot or Freezing with stumbled Screen or Freezing with black Screen and Power going away from USB Devices FDD still running for a while Fan keep running After restart absolute no log entries - except that an unexpected stop happend (entry made at restartup time). For me this is a motherboard-issue (all I could test is re-inserting the old processor again - no change). Of course, support time was only 1 year. I don't like to purchase just a new one: I was very satifyed with it an it's not yet "old" in any sense. I could not find out, if DELL would repair it paid. And I'm afraid they take a lot of money and don't solve the problem... Does anyone has experience with letting a PC repair from DELL after supporttime has expired? Do they do this? Is it a good idea to make a try putting another motherboard in the case and keep all the components? I will loose the VISTA license, right? Oh man, this is so frustrating!

Specifically what components did you add?  Power Supply, new CPU?

As mentioned, I replaced the original processor with an Intel Q6600 4-core processor with 2,4 GHz (which was told me, is a compatible replacment). I don't know exactly the spec of the original processor, but it was an Intel with 2-core and 2,13 GHz or so. The replacement was necessary to have bluray (or HD-DVD) movies displayed smooth without stucking - when displaying a bluray movie, all 4 cores show used with about 80%... And I replaced the videocard and one DVD-drive. I kept the power supply. This configuration I have runned for about 9 months perfect without any problem. I did not change anything except having the automatic update of windows doing it's job. The problems started suddenly, surprisingly from one day to the other. Now I have usually crash-downs every 30-60 minutes. Once it runned for a day without but then startet again crashing periodically.

There is an option in Vista where you can automatically reboot when there is a stop.  Try to uncheck this setting, thus when it stops it will blue screen and hopefully show you the stop code.   From there you can begin narrowing your scope.  Is a memory dump being created?  Can be found on the C: root, with a .dmp extension.  Also check out this little app:  http://www.7byte.com/index.php?page=hotcpu

It will test your hardware and report back any issue.  It potentially sounds like an app/OS issue vice hardware based on you 9 months of no issue after the hardware upgrades.  Good luck.

* Go to system properties, Advance Tab, look for start-up/recovery section, option to restart should be there.

As mentioned, I replaced the original processor with an Intel Q6600 4-core processor with 2,4 GHz (which was told me, is a compatible replacment). I don't know exactly the spec of the original processor, but it was an Intel with 2-core and 2,13 GHz or so. The replacement was necessary to have bluray (or HD-DVD) movies displayed smooth without stucking - when displaying a bluray movie, all 4 cores show used with about 80%...

And I replaced the videocard and one DVD-drive.

I kept the power supply.

This configuration I have runned for about 9 months perfect without any problem. I did not change anything except having the automatic update of windows doing it's job. The problems started suddenly, surprisingly from one day to the other.

Now I have usually crash-downs every 30-60 minutes. Once it runned for a day without but then startet again crashing periodically.

Ich changed the setting for auto reboot - although I don't beliebe that these were "reboots" - when it happens, the system is away from one moment to the other. It's not kind ob "crash and reboot" - it's just "reboot".

There are also no dump files on the disk.

I tried that HotCPU Tester Tool and it says my PC is okay...

So I really mention to get a complete new case with board and PSU.

Is there really no way to reuse the Dell-OEM-Vista license? I know that the installation medium checks if "it" is a Dell if I have to reinstall it...

Is there a way to keep the RAID 0 logical drive alive for another board with another RAID-Controller??? Could this work?