My RoadyXT forgets what channel it was set to when I turn it off for more than a few minutes. It remembers if I'm only moving it from one vehicle to another, but when I turn it off overnight, it comes on to the preview channel. Also, there is a faint high-pitched whistle coming from the unit itself, not from the speakers. Is there an internal battery that needs replacing?

Try unplugging set for a while and also disconnect all cables, seen a few where something on one specific .1 type channel confuses the set and locks it up, if you get it working go in the menu and delete that channel.

to fix it, first try removing your battery to reset it

For clock turn key on and stereo off. Press and hold the function button for 3-5 seconds. the clock should appear with the hours flashing. Use the up-down buttons to set hours. Push the right button to set the minutes. Now turn on the stereo with the source (or power) button and your done!
Remember key on stereo off. hold function, the rest will become second nature once you've done it a few times.
Tuner pre-sets are super easy. Tune to the station you want and then just hold the # button (1-6) that you want that station on for about 3 seconds. The channel your on, (e.i 104.9) will flash a couple of times and then stop flashing. When it stops flashing it's in the memory. Tune your next channel and hold # 2,3,4,5,6, If 6 isn't enough push BAND and your on FM-2 with 6 more pre-sets, Push it again for FM-3 with 6 more presets. Push it a 3rd time for the AM band with 6 pre-sets and one more time to get back to FM-1.

Pull out the power plug of your TV and don't use it for few minutes. Remove batteries from your remote and keep it without batteries for few minutes. After about 15 minutes your TV and remove both will work fine.

Turn the function knob to CLOCK, then press and hold the HR button for a few seconds and set the hours. Then press and hold the MIN button for a few seconds and set the minutes. Remember, the LCD will show "PM" if it is on PM, but it will not show anything if it is on AM. Once you are done setting the time, don't forget to turn the function back to AUTO-ON, or your coffeemaker will not brew at the set time in the morning.

-Tha Mp3 Doctor

Sounds like a software glitch, you should try

I need to get my Delphi XM Roady, Roady2, or RoadyXT repaired, where can I take it?
At this time, Delphi does not currently have an authorized repair center. If you are within your one-year warranty period, please contact the Delphi Warranty Center at 1.877.GO.DELPHI (1.877.463.3574). Hope this is helpful

If a red light flashes for more than a few minutes,disconnect and reconnect the power cord.
Check the TV/VIDEO settings
make sure you have inserted the batteries correctly to remote control.
Try another channel to rule out of station trouble.
if the problem continues may be a power supply problem.
good luck ! please dont forget to vote if this suggestion is helpfull.

make sure you lock the setting menu.

The set you have has a bad tuner assembly. At this point most likely you would be better off getting a new TV set. Good Luck

If your roadyxt came in a red box then you need to hook up the XM SureConnect to your vehicles antenna. The instructions that come with it are simple and straight forward. Your FM transmitter will not work unless you hook up the sureconnect