How to change input settings without remote - Sanyo DS27820 27" TV

Few, if any, modern TVs provide the option to access menus without a full function remote control - that excludes the majority of universal remotes...

You should have a remote control to select its inputs.
If you wish to buy its original remote control, contact the authorized service centre, or authorized dealer to your device brand. They can either give you a genuine remote control to your device, or can direct you, from where can you purchase a suitable one.
To select a proper universal remote control, you should know about the number of digits to its set-up codes. There are 3 digit, 4 digit, 5 digit, 2 digit and even single digit codes, to some brand devices. After confirming this, check the sites linked here. Both the sites have set-up code list and set-up procedure to many popular brand remote controls. Check which brand remote control has set-up code/s to your device brand, and buy that one according to availability? Brand name of the remote control isn't a matter, but it should have set-up codes in its code list, to the device brand you have.
Please note: Every new universal remote control will have set-up code list, and set-up procedure along with its pack. Never accept a remote control, that hasn't both of this. For more details about the set-up codes, visit the site http://electrohelponline.blogspot.com/ Check this site too. http://remotesearch.blogspot.com/ Universal remote controls are available at most of the electronic spare part selling shops.

If you wish to get more; check the site linked here. It has set-up code list & set-up procedure to many popular brand remote controls. See it in "Mosaic" view. It will make surf easier.
http://electrohelponline.blogspot.com/

You can't select its input without its remote control.

There is no way to change the input to this set without its remote control.

Use the menu button to get into the set's menu and try to program without a remote----failing that GOOGLE the model number to locate a new remote.

If I'm Correct There Is Only One Set Of Inputs On That Model TV. What Inputs R U Reffering To?

If you don`t have input selector on the set or in the menu you might be able to get it with the channel buttons, that would be right below channel 2 or above 125

There might be an input button or menu button on the front of the TV (or behind a door or panel) that will let you set it for video input.

If you have lost the remote, go to any electronics store and buy a universal one. I have programmed many generic remote controls, and they all work fine for adjusting the video inputs. Not all television sets allow their video inputs to be switched without the remote. Most likely you will have to buy a replacement.