Ok i was stupid enough to think i could do this and now relising im way outta my league lol. Bought a computer which person said had a hard drive issue, so i took out the old hard drive without testing the pc and replaced it with a new western digital blue WD5000AAKX 500gb hard drive. The computer is an old pentium 4 2gb ram. There is power to the machine, but wont boot up, only beeps continously and theres a flashing blue light coming from the motherboard area (havent investigate were). I tried to eject the disk drive to put a cd in it it wont eject but makes a noise. I get nothing on screen at all. Before im asked yes all leads are connected, sata & power. Im not a computer wiz and watched a video on utube showing how to replace, thinkin is that all, i can do that!! cough cough. Really need someones help on this. Thanks ahead!!!