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The Mintek DTV-260 only has a NTSC (analog) tuner. You will need to connect your RCA antenna to a digital to analog converter box to watch TV over the air. Then connect the output of the converter box to your TV.
The common converter boxes are limited to SD output. You might be able to find an HD converter box online. (With the standard converter box, the available outputs are coaxial and composite video.) The DTV-260 has a composite video port; alternatively set the TV to channel 3 or 4 and use the coaxial (RF) input on the TV.
There may be a low-power station that still broadcasts in analog. However these are rare. You will need to switch from CATV to OTA (Air) to check for one of these stations. Analog Cable has different parameters than scanning for over the air signals.
If you are using an indoor Antenna: 1- the most probable reason would be the location of the antenna and TV in an area where the reception is very low. Indoors all houses are affected by the running electrical circuits which in turn generate magnetic field that together with the structure of the house obstruct or weaken the wave signals of wireless and TV reception. Also this issue may be aggravated by the vicinity you are live in. Where you are living may not have the optimum reception from some services including TV signals. Your best bet is to try moving the (Indoor) antenna closer to the outside (such as windows, or better to a balcony) and try all four directions of the house. 2- One other possibility, is the antenna jack being disconnected from one of its wires (or a de-solder) at an internal part of its circuit). This problem can be detected by trying another antenna that is working good when used with another TV (and preferably at a different location) thus testing for the possible weak signal at the same time. 3- The last possible issue is the antenna receptacle built onto the Tv set. This may have a problem of some element of it disconnected internally on the board or de-soldered.. If the Antenna is external, all the above points are still valid, but the probability is higher, for some hidden disconnection on the receptacle, the antenna plug or at the connection of the co-axial cable with the external antenna. (Once I found a co-axial cable with disconnections of its central copper wire within the protective insulating coat- probably due to defects in the plastic coat that had microscopic holes that allowed air and humidity into the central wire and caused it to corrode and have those discontinuities)..
May just not be good enough antenna to receive the signal--try to with the remote direct enter a channel you expect to see and if it works you can in the menu add that to the memory---manually enter and add each possible channel.
Plugging in a different tv does not really prove much, tuners vary slightly in the way they handle signals It may just be that your aerial needs a very slight adjustment or has degraded slightly. Can you plug the coax into another device (vcr?) and out of that into the tv and see what happens? vote appreciated
Could be bad reception and or make sure the tv which was in the cable mode when you had cable now needs to be in air or antenna mode. IF you have another tv that works ok then you will know the channels just need to be reprogrammed for over the air signal. Go into the menu of tv and find program channels and switch to air or it might say antenna..
This tv has an analog tuner so you will need a digital-to-analog tuner set-top box (assuming you live in an area where most stations have been converted to digital TV broadcast). Whichever tuner you use, the recommended antenna will depend on where you live and how many tall objects are between you and the transmitters. Go to antennaweb.org or tvfool.com and type in your address. Antennaweb assumes an external antenna but is still very conservative in the channels it will identify as watchable in your area. Tvfool.com lists the channels by direction and the antenna type (by color) you will need to receive them. The color rating is based on how far the stations signal travels to reach your location. An amplifier can help you receive stations that are marginal to your location. (Digital signals are sufficient for the TV to tune them in or you get "no signal" messages.)
I hope this helps.
Cindy Wells (I'm in a rural area with an external antenna with a signal splitter/amplifier. Antennaweb suggests I will only get the stations ~10 miles away. In fact I get the stations from there as well as the ones ~30 miles away.)
Is your antenna "omni" or "uni" directional? "Omni" means you won't have to aim the antenna but "uni" antennas have to be pointed in the direction the nearest tower/s. You'll want to go to AntennaWeb.org and enter your address. This will show you locations and distances of TV towers in your area. My location is over 39 miles from any tower so I get virtually no reception with regular HD antenna. If your more than 20 miles you'll need to get a fairly high gain antenna and have to aim it in the direction of the TV tower.
check that the coax cable is complete and has no internal breaks. get a new piece and even paring both ends to wire you should get pic and sound even if its not clear. then attach new plugs and connect. Also check that the outside cable is still connected. If iit goes up into the roof check mice or rats have not chewed the cable. Even a rabbits ears antenna should be able to oick up some signal even in a poor reception area.
Sometimes if it snot an antenna problem select rescan on the remote to check for signals
Digital tv converters and digital tv for that matter require a good signal to operate, a good quality rabbit ears available in a number of stores will get you some local stations. To get maximum reception you will require an outside antenna.