Hi Pyee - I had the exact same problem as you with a Series 3 and the recommended WD10EVVS drive. Followed all instructions exactly, but TiVo never got past the Welcome...Powering Up screen. Thought my drive might be bad, so I RMA'd it and received another. Same issue with the new WD10EVVS drive. Both drives had a mfr date of Sept 20 2009. Could this be a bad batch? Or maybe something changed with the firmware? I've gone ahead and ordered a Seagate to try that. But anyone have any insight or help with the WD10EVVS not working with a Series 3?