I recently built a new computer. It consists of a ECS micro ATX board, C2D e7300, 2GB Crucial RAM, and a 500gb WD HD. I'm using the on-board video until my video card comes in. I reused a cheap Thermaltake 450w ps from my old computer. Anyway, I shut the system down to put in my TV tuner card. The card is PCIe X1. That's ALL I did, took the cover off and put the tuner card in. I finish everything up and try to power it back up. First time I push the button, it does nothing. I push it a second time, It tries to start for about 3 seconds, then shuts off. I try again several times, and it's completely dead. I'm thinking great, the power supply bit the dust. Five minutes later, I try to power it up and it starts right up. Could this be anything other than my power supply?