I have a Sirius Stiletto 100, I noticed the whell was respondng slowly the other day, then all of a sudden the dispaly screen said...entering debug mode, then it froze up and remained that way. I`ve pwoered t off and removed the battery several times. Now it just freezes during the powering up phase. I can`t even connect it to my P.C...it just stays frozen.

SOURCE: Stiletto 10 is not reconized by My Sirius Studio

Firmware version was too old to be reconized by new version of My Sirius Studio (MSS). Put Stiletto into recovery mode, pulled the latest driver from sirius, updated, which allowed MSS to see the unit.

SOURCE: usb connection on sirius stiletto 2 to pc

You must be sure to have satellite radio turned off in order to connect to the pc. If you are using a home dock, first make sure satellite is off and then push the "Sync" button on the front of the home dock.

SOURCE: Sirius Stiletto 2 Problem

That's one of several problems my Stiletto 2 has. The only solution I've found is to "reboot" the unit. You'll have to remove the unit from the cradle, pop the back off, and remove the battery for a few seconds. Then put everything back together and power it up. It will take a minute or two, but once it reboots it should be fine.

SOURCE: Sirius stiletto 100 in demo mode

All you have to do is press and hold the display button for approx 30 sec with the unit powered on. It took mine right out of demo mode.

SOURCE: white square on sirius stiletto 2

I ran the stiletto device recovery program and it works again. You can find it on the Sirius website by searching for "stiletto device recovery". However, it does delete all of the content that you have saved on the stiletto.