I have just troubleshot a friends PC. The Hard Drive has failed (it was clicking, due to bearing failure). So we purchased a new Western Digital 40GB 7200 RPM Hard Drive. I installed it, as the master because it is a single drive application, with no slave in line. When the system restarts it POSTs like there is no problem. The boot diagnostic screen displays the CPU is found, the CD ROM is found, then the screen stays where it is and will not advance. I am out of typical troubleshooting solutions and at the end of my rope. Please advise.Short of telling me that we purchsed a bad hard drive, that is.