How do I change Channel default on start up - Computers & Internet

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