Sanyo tv 5 years old only shows screensaver .get great picture on apple box but no tv channels

Use your remote. Press menu and look up initial set up or reset to factory settings.
* Note that as of Jan 2018 most cable companies do not provide analog outputs to TV sets. If your still using Channel 3 for an input to your TV then it won't work or will stop working some time this year.
* Hook up your TV using the old RCA video/audio jacks; Yellow plug is video, Red is audio right, White is audio left.
* You can also use an HDMI cable (best) for High Def picture which is all the rage for HD TV.
* You may also connect using the DVD style cable hook up which uses 4-5 separate cables (3 for colors and 2 for audio)
* Once you have some sort of video or message on the TV screen then you can proceed to setting up the cable box. Have the cable box hooked up and on for at least 15 mins. Look at the cable box display till the correct time is displayed. Power up the cable box till you see the power on indicator. Now use your TV remote to select the correct input you hooked your cables t. (probably HDMI) The display should show you your cable service. Now use the cable remote to select your channel.
* If you don't have a cable box but still have digital service (usually called basic cable - no premium) then use the analog/digital input on the TV remote and select initial set up. There should be an automatic channel search and set up to scan all the channels available on the line your connected to. This will take up to 15mins. If you know the specific channel you can cancel the scan and pick each channel for you own list. Letting the scan run may help you find other channels you are unaware of.
* Final; if your still having problems then call you TV MFR support line and they will talk you through to check your set.
* You can also check the cable company support line if the TV check out okay. The cable company may or may not be able to supply you service for really old Tube style TV sets as most if not all TV's are digital now.
Aloha, ukeboy57

Is the TV set to air or cable? It has to be set to air/antenna and a channel search has to be done first before a picture will show.

Your TV must be set in cable mode for channels higher than 69, and your cable provider must allow those channels to be received without a cable box. Menu, Channels, switch air to cable, run auto scan. If it receiving those channels unencrypted, it will find those channels.

Actually that is quite a rare case on today's modern digital flat panel TV's. You're not saying where you live, and you're not saying if you have previous issues on older TV you had before digital, and (again) you're not even saying whether you're on a hill or deep into a gorge. No TV has ghosting these days, but if you're living in an area as above, go see the TV people and they will probably recommend a set top box. But that isn't really necessary if you have a modern flat screen TV because most of these TV do two things, they give you a crystal clear picture or they don't. Digital TVs have a channel searching system that does the searching for you, and, as the case may be, these only pick up the best channels that give the sharpest picture. Anything that is of poor reception they ignore, so you're actually missing all the channels available because of this ghosting issue. AN there is nothing to adjust on the ghosting, snowing and vertical or horizontal bars, etc. These issues are things from the past, e.g. old analog TV's.

Go to the TV setup menu and autodetect all channels. This should fix it. This is assuming your Sister is not using a set-top box.

In that case, you neet to leave the set on either channel 3 or 4, or use the video/audio input jacks and leave the set on VIDEO IN. The best picture with a non-HDMI set-top box will always be with the AV OUT from the box going to AV IN on the set [the white/red (audio left/right) and yellow(video) connections].

If she is using a set-top box with an HDMI output, connect an HDMI cable to the set and select HDMI IN for the absolute best picture.

When I installed my dads Samsung 40 lcd 120 hz. I had to turn it all off and after 5 mins I turned on the cable and then 5 minutes later I turned o the tv.

Or have you tried "searching" the tv for cable channel's?

That works great except I can get the tuner to program any channels above channel47. Is this a limitation of this older model TV yes there is limitation in old tv. is there some setting I can change in order to get more channels using the tv tuner? in INDIA what we do is put a remote control ckt which gives us about 250 channels. of course we replace tuner also called hyper tuner along with remote ckt or replace whole kit which are cheaply available.& serves the purpose. hope this will help

When I turn my tv on there is one certain channel that goes black after watching less than 5 minutes. this might be due to electronic tuner or loose contact in that particular section. 100% problem will be solved thanks

i know this problem, happened to me with the comcast Motorola HD receiver box. The key is with the setting in the cable box. Switch on the TV. Set the channel to normal tuner channel 3 or HD input. Turn off the cable HD box. Press the Menu Button on the Cable box or the remote. You should see a Menu. Use the cursor keys to navigate The default setup is also one of the option, Right click on your cursor keys acts like the computer keyboard enter key and applies the change. The default setup is 16:9, the shacking would happen if you have set the picture type to "PAN SCAN". change it to either 16:9 or 4:3 Letter Box. The shacking should stop. Hope it helps.

Are you using cable to get the picture? If you are, make sure the TV set is in the cable mode,If it is then you most likely have a bad tuner in your set. Good Luck