First let me say, I have read through about 30 threads and have not found my exact error yet and was needing some help. If you know of a thread that addresses my following issue please let me know and I will read it. I recently purchased a TIVO TCD540040 and wanted to upgrade drive. I already owned a Western Digital Caviar 120GB so I decided to use it. I am replacing the original TIVO drive to keep as a backup. I have run through both Hindale's and Weaknees' upgrade instructions and continue to end with the same error. After running MFS tools 2.0 and installing the new Hard drive into my TIVO, the TIVO will not turn on at all. I do not get the "Welcome" or "Almost there" screen. All the TV shows is a black screen with random jumping white lines every now and then. The case fan does not spin. The hard drive does not spin up. Any idea what I might have done wrong or even might need to do? I can then return the old hard drive back into the TIVO and everything is fine. I have run full Western Digital diagnostics on the drive and it reports nothing wrong. I have fully reformatted the drive since and reinstalled XP and it runs fine. Using the upgrade instructions I have tried both options of either "make copy and lose recordings" and the option that is supposed to keep all my recordings. During both methods I do not get any error messages from MFS tools and it reads the size of both my drives correctly. I am knowledgeable of the insides of computer so I understand jumper settings. I do not know anything about linux so I do not know any other options to run while in MFS tools. In the past I have used this Western Digital drive for both Linux and XP and it worked fine for both. The only thing I can even think of to try that I have not yet is to run Western Digitals tool that writes 0's on the entire drive, but I have no idea if that would help at all. Please if you have any advice or if you know of a thread that addresses this issue, please let me know. Thanks in advance.