I own a Dell Inspiron 1545 that uses, I believe, a Pentium 4. I wanted to upgrade it, so I looked and found that the strongest processor the laptop officially supports is an intel core 2 duo T6600. I purchased one and installed it. However, when I subsequently turned it back on, it powered up and the fan started, but nothing displayed on the screen. Not even the BIOS came up. When I re-insert the old chip it works perfectly. Am I missing something? Do I need to install a driver for it first or something?