Turning on and changing channels with no input from remote

First try a simple "reset":

1) Turn TV off. Unplug all TV inputs, and the AC plug from wall. Wait 5 minutes (I mean it, a full 5 minutes!).
2) Connect your normal TV source (cable or satellite) ONLY, then plug in and turn on the TV.
3) You may need to press the RESET key twice after connecting the signal and turning on the DTV to restore some functionality.

Now plug in ONE A/V component at a time to test. You can also try replacing any A/V cables (RCA red/yellow/white, HDMI, etc.), as cables do occasionally go bad.

Make sure TV is "tuned" to channel 3 before pressing the "input" button on remote control This is easiest done with the actual channel up/down buttons on the front of the television itself, or possibly by pressing 03 (or 03, Enter) on the remote control.

You may find that only one A/V input is bad (ex, VIDEO 1 port), while others work.. or they may all be bad.

If other functions of remote control are working (but "input" button still does nothing), could simply be a bad remote. Try eBay for a cheap replacement.

If there is not a manual "input" button on the TV itself (I think not for this particular model), and you still can't change AV input, you are probably out of luck. I recommend read included instruction manual carefully, then contact the manufacturer if needed. Instruction manual may be viewed at:
http://www.manualslib.com/manual/599522/Sanyo-Dp42746.html#manual

Do not attempt to disassemble TV. There are no user-serviceable parts inside, and even an unplugged TV can retain enough electricity (in capacitors, etc.) to seriously hurt a non-trained human. This TV is probably ~ 9 years old; parts are available (eBay, etc), but may not be worth fixing considering huge price drops on new TVs available now.

Your T.V. is programmed to store the last input you've selected. You have to manually switch it back to your T.V. channel input after each time you switch it to HDMI or any other input even when you turn it off. The "Source" or "Input" button on your original T.V. remote will change this.

There may be an option in the menu section of the T V (may be by using the remote) that is switchable between turning on with last channel viewed, or it is set to turn on to a particular channel or input such as that component input. Hope this helps.

I have just got a kv-20s43 and your best bet is to try to restore settings, here, To reset TV to factory settings, turn the TV on, Then, while pressing the reset button on the remote control, press POWER on the TV. The TV will turn itself off, then back on, the original settings wiill be restored... definition: ch. fix- 2-6: Select when you want to control all channel selection through a cable box. Select the appropriate channel(usually 3 or 4) and use the cable box's remote control for channel selection. VIDEO: select from available inputs when you have connected video equipment and you want your TV fixed to it.

Most of the time it is the front contact switches Dirty clean them with contact cleaner or replace contact buttons on front panel board 29 cents each Call Mats 1-800-628-1118

You have a bad Main bd.

your turning section is not responding to any input, hence needs to be checked by a technician. every thing you have mentioned are controlled by one ic, with its respective voltages.

you might try going to channel 00
If you cannot just dial the number 00, go to channel 2 and then channel down.
Does not always work, but without the model number of the TV it is hard to advise further

Hi, I brought a EmersonTV model EWF2004 without a remote control and I can't find the AV channel to watch DVD's I hope you can help me

On the TV itself, press the MENU button. When the menu opens, "PICTURE" should be highlighted in pink and the rest of the menu items will be an aqua color. That means you are in the right place....Press the volume "up" button... this will open up the Picture menu items. When the menu opens, start pressing the channel "up" button. You will see (bright, color, etc.) options in this menu. Keep pressing the channel up button until you see "Game Mode"... the options will be ON and OFF. Use the volume "up" and/or "down" buttons to toggle back and forth between ON and OFF... if you want to watch TV, be sure to turn the Game Mode OFF... otherwise the picture will be VERY dark...