Best diagnostic steps

This morning, my Roamio Pro rebooted during the "Warming up...." screen. Unfortunately, it now seems to be stuck in an endless reboot cycle, getting as far as "Welcome, Starting up..." for about 10-15sec before cycling again.



I've tried the usual stuff:

• Unplugged both the power cable and ethernet, re-seated the cablecard.


• Tried to run a Kickstart 54 to check the hard drive, but even though the alternating green/orange lights suggest the code was accepted, the diagnostic screen never appears. Just continues with the same reboot cycle.

Since I'm not that familiar with the purpose of the other Kickstart options, I haven't tried any of them yet. I don't want to just start shooting in the dark and possibly making things worse. So I'm looking for a little advice on "next steps" to try.



I'm comfortable with the Kickstart procedures, and I'm familiar with diagnosing hard drives in a Windows environment. So I'm happy to try any of that (though I'd like a little reassurance that plugging the HDD into Windows system won't mess with the TiVo OS).



A couple other points:

• This particular unit is about 13 months old, so I'm assuming it's out-of-warranty.


• It has lifetime service, so not prepared to junk it.


• It has a lot of stored programming I'd really hate to lose. Even if I'm looking at a flaky HDD, I'm really hoping I can at least pull the (transferable) data before replacing it.

So again, just looking for tips on what to try next. Any help greatly appreciated.