I really do not want to be stuck on the phone with some tech guy in India for two hours again, so I wanted to ask some professionals. I have a Dell Inspiron 530, bought back in 2007 - Windows XP OS 3G of DDR2 800mhz Ram (2 - 512Mb and 2 - 1GB) Intel® Core™2 Duo Processor E6550 (4M Cache, 2.33 GHz, 1333 MHz FSB 500GB HD 300 Watt Power Supply NVIDIA GeForce 8300 mGPU graphics card M-Audio Fast Track Pro external sound card This computer is my studio baby. I use it for all my computer graphics and 3D animation work, while my husband uses it for all his audio recording work. About 2 years ago, it did the whole turn itself off and on and off and on, etc. , so we had the motherboard and power supply replaced and it worked like new. Just last week, it happened again, same power off/on problem, so this time we had the motherboard, power supply, heat sink, and fans replaced. It worked fine for a few hours, and then suddenly shut itself off again. It hasn't done the whole turn itself back on and off thing multiple times yet, so I'm thinking this might be a new problem. Any suggestions? Thank you in advance for any help!