How do I keep it on Digital? When I try and turn the channel, it goes to Video 1. It says Digital channel signal strength is low.

ManualsLib has the manual for the Sylvania LC321SS9 here: https://www.manualslib.com/manual/500307/Sylvania-Lc321ss9.html . See https://www.manualslib.com/manual/500307/Sylvania-Lc321ss9.html?page=18#manual for the directions for manual scanning of channels. If the TV looses power before you turn the TV off with the power button, the scanned channels will not be saved.

I hope this helps.

Cindy Wells
(Note: some TVs will delete digital channels from the stored channels if the signal strength consistently is too low for the tuner to interpret.)

buy one of those 15 or 20 dollars amplifier to step up the signal. Radio Shack is gone. Try the internet.

Check the orientation of the antenna. Try to rotate it, and see whether the signal strength varies. If the signal strength is too weak, digital channels will show many problems. Try a signal booster. Contact any service technician. http://electronicshelponline.blogspot.com/

Try checking the signal strength then run the scan again.
Checking the DTV signal strength
You can check the DTV signal strength to determine if you need to adjust your antenna or digital cable input. The higher the signal strength, the less likely you are to experience picture degradation.To check the DTV signal strength:
1.Press MENU. The on-screen menu opens.

2.Press < or > to highlight Channel, then press v. The Channel menu opens. The DTV signal strength is shown at the bottom of the menu.

3.Press EXIT to close the menu.

you need to get a digital aerial first .then you can sort out any other problems from there

You Can Try Changing the Wireless Channel on the Router you have 11 Different Channels Available.

> Steps to change the Channel

- Open Internet Browser on Hard wired computer & Go to 192.168.2.1

- Towards your Left Corner Under Wireless Click on Channel & Ssid

- Leave the Password Blank Click on Submit

- Change the Wireless Channel To Number 1 or 6 or 11.

- Click on Submit

- Check the Signal Strength

- If you Still Have Low Signal Strength you Can Try Updating the Firmware or Changing the Wireless Mode to G only... :)

No,Ur Digital antena not getting a good signal,because of lanscape like hills or big buildings,blocking the signal,that why u not getting good signals,or no signals at all.Buy another name brand digital antena with a stronger signal amplifier.Or buy a digital roof antena,well help or solved these problems.

Are you using the coaxial cable to connect the converter box to the set, or have you hooked it up with rca type video cables? The latter are highly recommended if you want a better connection and have audio/video inputs on the back of your television. But you don't want both A/V & coaxial.
Also be aware that some older antennae will not pick up digital signals well. Try to use a coaxial cable all the way up to the antenna junction. Find out where most signals are broadcast from in your area and aim the antennae appropriately. (Use a compass.) See helpful link here. Your converter remote should have a signal strength button that you can use to check the various channel strengths. If you're using a coaxial link to the tv and have little signal strength, expect a poor picture. You'll also want to select the Mono option for Audio Output in the converter menu.
Finally, depending on the age of your set, if you're using rca video inputs, use the TV/Video button or the AV button on the TV or universal remote to switch the input from the channel on your TV to the video 1 setting (or whatever picks up the digital converter signal) so you'll get that clear signal. Then you can use the converter remote to change channels, adjust volume, etc.

Get an outdoor antenna. Digital signals very rarely reach indoor antennas unless you are within ten miles of the signal origin.

Just to make sure, you do have analog tuners setup right?  Media Center 2005 requires analog tuners be working before digital tuners are allowed.