I bought a Proscan 26LB30Q TV. After connecting to the indoor digital antenna, no signal showed up on the screen. What could be wrong? Thanks.

As an past Radio Engineer I feel compelled to tell you that the conversion to HD in FM and TV signals did not do all of us a favor.
The coverage pattern of stations has decreased to the level of about 70% due to this new advanced technology. I think what your real problem is comes from a misunderstanding of what a HD TV signal must be supplied from. In my house as an example which is 21 mikes away from Chicago and the Willis building where a lot of TV signals are from, the need to put up a new higher gain $100 HD TV antenna was required. You can get such antennas from Antennadirect web site. You will also require a length of high grade 75 ohm coax cable- I bought the high grade Digital TV cable from Gepco International with a 3 GHz bandwidth and also distribute the signal to a number of TV's either with a Wineguard or Blonder-****** distribution amplifier.
My antenna is mounted near 30 feet off the ground. Places like Radio Shack may sell these kinds of indoor TV antennas but they are depending on the lack of knowledge of the people buying them to sell the product. It also depends on how far you are from the source of transmission. If you are 5 miles in a high rise building facing the transmission tower, you might have luck with an indoor antenna, if you are 20 or 30 miles away from transmission you might have to go to more elaborate measures to get a signal down to the TV. There is no magic to it just a need for a person who understands the signal levels and what is needed. I spent time as a Chief Engineer for 4 Radio stations in Chicago as well as was involved in a FM HD installation or two.
See if you can find a Television shop that you can ask questions about your installation. They may be able to help you mount a roof antenna if you can not do it yourself.

Unless you are very close to the TV transmitter aerial it is very unlikely that you will get adequate signal for digital TV with an indoor antenna. Check with your neighbours to see what they use and where the nearest transmitter is.
Unfortunately, with indoor an antenna, the amplifier also amplifies any electrical interference from other devices in the building.
First step would be to try taking it outdoors (use an extension cord to get well away from any buildings, trees or large metal objects that could block the signal).

If you live in the city you should be able pick up to one three channels on the indoor antenna, but if you are outside of the general viewing area you won't pickup anything. Antenna's of this sort have a very short range when it comes to tv signals, it is also possible that your antenna is not digital ready, which means any station broadcasting a digital signal you won't be able to receive.

Is the antenna suitable for digital TV signals?
The TV signal is weak, if the antenna is an un-powered device then I suggest you get a powered antenna, this will amplify the signal.
Moving the antenna closer to the window will help.

If you're using an indoor antenna (rabbit ears), you'll find that there's little difference between them. Yes, you'll see all the fancy knobs, but mostly all they do is delay the signal from making it to your antenna jack, hopefully enough to reduce ghosting on analog channels...or a resistor circuit that reduces the signal strength. Receiving a good signal with an indoor antenna can be difficult...there can be obstacles between your tv and the broadcasting station, you could be too far away...it's hard to tell. Before you use an outdoor antenna (consider a good RV antenna if you need to use it indoors), try an antenna amplifier. It'll have to handle both VHF (at one time channels 2-13) and UHF (channels 14-69 analog). If it's an "antenna amplifier," it will be sufficient. If it's a cable amp, it would be a hit-or miss. The amp may be able to boost your signal with the indoor antenna you have now. Alternately, you can buy an indoor antenna with the amp built in. Hope this helps.

Use an Antenna that Provides Good Reception of All Channels

• Most existing antennas used by consumers will provide good reception of DTV signals. (Before making any changes, try your existing antenna first to see of it allows you to receive all the stations you normally watch.)
  
• For watching DTV signals, you will need an antenna that provides good reception of both VHF signals (channels 2-13) and UHF signals (channels 14-51) to reliably receive all of the digital signals broadcast in your area.
  
• Many antennas are designed only for reception of either VHF or UHF signals (but not both). For example, the commonly used “rabbit ears” indoor antenna is only suitable for receiving VHF signals. To receive UHF signals, an indoor antenna should also include a wire loop or other feature for reception in that band.
  
• The reception capabilities of TV antennas also vary considerably, so be sure to talk to retail consultants and look at information on the packaging and/or the Internet to make sure that any new antenna you may choose provides good reception of both VHF and UHF channels. In addition, if you use an indoor antenna and receive signals on VHF channels, you may need to use an antenna with amplification.
  
• Many antennas currently being sold as “HDTV Antennas,” perform best at receiving UHF signals; some of these models state that they provide reception of signals on channels 7-13 but actually perform less well receiving those channels. If you obtain one of these antennas, be sure it provides good reception of all the VHF channels as well as the UHF channels.
  
• To check for the DTV signals that are available at your location, use the DTV Reception Maps available at www.fcc.gov/mb/engineering/maps.
  

Check Your Connections

• Check that your digital-to-analog converter box or digital television is connected properly. Make sure your antenna is connected to the antenna input of your digital-to-analog converter box or digital television. If using a digital-to-analog converter box, also ensure that the antenna output of your converter box is connected to the antenna input of your analog TV. Refer to the owner’s manuals of your components if you are unsure of the proper connections.
  
• Ensure that your components are plugged in and have their power turned on.
  
• If you have a digital-to-analog converter box, tune your analog TV to channel 3. You should see a set-up menu or picture displayed on your TV screen. If you do not see a set-up menu or picture, tune your TV to channel 4. If you still do not see a set-up menu or picture, recheck your connections.
  

Perform a Channel Scan

• Digital-to-analog converter boxes and digital televisions have a button, usually on the remote control, that is labeled “set-up” or “menu” or some similar term. Press that button to access the set-up menu. Using the directional arrow buttons on your remote, scroll to the option that allows you to perform a “channel scan.” The channel scan will automatically search for digital broadcast channels that are available in your area. Consult the owner’s manual of your digital-to-analog converter box or digital television for detailed instructions on how to perform a channel scan for your device.
  
• Once the channel scan is complete, you will be able to tune to the digital channels received by your antenna. You should perform a channel scan periodically to check whether additional digital channels have become available.
  

Adjust Your Antenna

• Small adjustments to your antenna can make a big difference in the number of digital channels you can receive. If you have an indoor antenna, try elevating it and moving it closer to an exterior wall of your home. After adjusting your antenna, perform another channel scan to see if your reception is improved.
  
• While adjusting your antenna, it may be helpful to access the “signal strength meter” on your digital-to-analog converter box or digital television to determine whether your adjustments are improving the signals’ strength. The signal strength meter is usually accessed through the menu feature on your remote control. Refer to the owner’s manual of your device for detailed instructions on how to access its signal strength meter. Remember to do another channel scan after you have adjusted your antenna.
  
• Television stations broadcasting in digital use both the VHF band (channels 2-13) and UHF band (channels 14-51). Many indoor antennas use “rabbit ears” for the VHF band and a “loop” or “bow-tie” antenna for the UHF band. Make sure you are using an antenna that covers both the VHF and UHF bands and have connected it properly.
  

If You are Still Having Difficulty:

• Until June 12, 2009, some stations will be operating at reduced power levels. If you are not receiving certain digital TV stations, this does not necessarily mean there is a problem with your antenna or digital-to-analog converter box or digital television. Check with the TV station to find out whether they are planning changes that will improve reception.
  
• When an analog TV signal is weak or receives interference, static, snow, and distortion will often appear on the screen. Digital broadcasting will provide a clear picture; however, if the signal falls below a certain minimum strength, the picture can disappear. This “cliff effect” means that if you watch analog TV stations that have static and distortion, you may have to adjust or upgrade your antenna system.
  
• Simple indoor antennas provide minimal performance that may not be suitable for your location. If you are unable to obtain satisfactory DTV reception with your current indoor antenna, you may wish to obtain an indoor antenna that includes features for better reception of UHF signals, as well as VHF, and/or an amplifier to boost the received signal (often referred to as an active indoor antenna).
  
• Generally, an outdoor antenna will get better reception than an indoor antenna. However, the performance of outdoor antennas can degrade over time due to exposure to the weather. If you are having problems, check for loose or corroded wiring, broken antenna elements and that the antenna is pointed in the right direction.
  
• Try to keep the length of wire between your antenna and digital-to-analog converter box or digital television as short as possible for best reception.
  
• “Splitters” that are used to connect a single antenna to multiple digital-to-analog converter boxes or digital televisions reduce the amount of signal available to each device. If you are having problems, check whether reception is improved without the splitter. In some cases an “active” splitter that includes an amplifier can solve the problem.
  
• If you are near a station’s broadcast tower, reception of that station, as well as other stations, can be impeded by strong signal “overload.” Consider using an “attenuator” or removing amplifiers to improve your reception.
  
• If you decide to replace or upgrade your indoor or outdoor antenna, many types are available from electronics retail stores at a variety of prices. Websites such as www.antennaweb.org provide information on the locations of broadcast towers and the types of outdoor antennas appropriate for the stations you wish to receive. If you need assistance with upgrading your antenna system, check with a local antenna retailer or antenna installer.
  
• To check for the DTV signals that are available at your location, use the DTV Reception Maps available at www.fcc.gov/mb/engineering/maps.
  

Hope it may helps:

Regards:
VOTIT

I carried my Westinghouse TV to the basement. Unplugged the antenna from the digital converter box and connected it to my digital TV. I then re-scanned for channels and found channel 9. After carrying the Westinghouse TV back upstairs, I connected the original set-up and tuned to channel 9 which was now showing on the screen as no signal. From that point I moved my VHF dipoles until I had located the correct position for reception. A little labor intensive, but I was fortunate to have another antenna that was receiving channel 9.

yes you will. either install an outside antenna or get a good amplified indoor antenna. try your old antenna first, but when your picture freezes or it says something like " weak signal " you will need that new antenna

One of the problems with digital reception is if the signal is not strong enough for the converter box/or built in tuner on a new TV- you will not get any picture at all. If you followed all the directions-and the converter box shows no channels- then you do need a better antenna. I don't know how far you are from the broadcast antenna, but a good rule of thumb is if you live 10 miles away, buy an antenna that is good for twice that distance, or further. They are rated in miles of reception