Stop c000021a {fatal system error} status 0x00000000 (0xc0000001 . . . Hi, Loose connections, minor corrosion (which is removed in the process), or other issues can be resolved by reseating the components Of course cleaning out dust bunnies can also be productive Glad to have helped Sounds like you did some very good troubleshooting! (If a reply was the solution please mark it as the "Answer" or if it was helpful please mark it as "Found this helpful - Me Too