I recently bought a new CPU to upgrade my old computer, and my friend wanted my old cpu to upgrade his sisters. His sisters computer had a Intel Pentium 4 650, and my old cpu is an Intel Pentium E2180 (Basically we are upgrading a Pentium 4 650 to a Pentium E2180). We cleaned them off, and put it in the motherboard(Both use socket LGA775) and when we tried to boot up the computer, it doesnt start. The computer is a Dell Optiplex GX 620, and it has 4 numbered lights on the front of the case to specify any problems. In our case, none of the lights are on, but the power button is solid amber, which is supposed to mean a power issue. Unless im wrong, the TDP on the Pent. 4 is 84W, and the E2180 is 65W. Shouldnt this mean it uses less power, and therefore shouldnt have a power issue?