I originally bought this THD new in May of 2009. At that time I upgraded it with a MAXTOR 1TB HDD and saved the 160 GB HDD that was replaced. Earlier this week I got home from work and the THD was stuck on the Welcome Powering Up screen, so I replaced the Maxtor 1TB HDD with the 160 GB HDD and the THD booted right up - I let it update the SW to 11m and successfully re-paired the MCARD (I have FIOS) and ordered a 2 TB HDD that I will use going forward. Prior to receiving the 2 TB HDD the system locked onto the Welcome Powering UP screen once again with the 160 GB HDD in there after working for 3 days. I checked all of the PS voltages and got 12.5VDC, 3.3VDC and 4.8 VDC and discovered two 1000uF Caps that were "bulging". I have the 2 TB HDD (a WB AV-GP HDD) but I am not sure what to do with it. Today I replaced the two "bulging" Caps and tried the THD again with the 160 GB HDD and still get the Welcome Powering Up screen locked. I am currently using Ultimate Boot CD to check the 1 TB HDD that I replaced with the 160 GB HDD this week. After all of this I am wondering what I should try next??? If the THD somehow damaged the 160 GB HDD (this drive was only used one time when I originally booted up the THD to check it out and then was immediately replaced with the upgraded 1 TB HDD) after I installed it, I do not want to take the chance of damaging the new 2 TB HDD. Any ideas???