How do I get to the service menu ? Sanyo Model DP42410

If you have already tried replacing the mainboard and it did not fix the issue, then the problem may not be related to the board. Here are a few other potential causes for a TV screen to shrink on both sides:

1. Picture settings: Check your TV's picture settings to ensure that the aspect ratio is set correctly. If the aspect ratio is set to "zoom" or "wide," it can cause the picture to appear smaller on both sides.
2. Overscan: Some TVs have a feature called "overscan" that can cause the edges of the picture to be cut off. Check your TV's settings to see if there is an overscan option, and if so, turn it off.
3. Defective panel: If neither of the above solutions works, it's possible that the issue is with the TV's panel itself. In this case, you may need to have the TV professionally serviced or replaced.

It's also worth noting that shrinking on both sides can sometimes be a normal behavior for certain types of content, such as older movies or TV shows that were originally shot in a different aspect ratio. In this case, the content may simply be displaying as intended.

The CS-9028iT remote control isn't one that I can find a reference for. The CS-902831T was a standard accessory with several Sanyo televisions models. One of which was the Sanyo DP42410. The manual for this TV is available here: https://www.manualslib.com/manual/261846/Sanyo-Dp42410.html . The page on using the remote control is available here: https://www.manualslib.com/manual/261846/Sanyo-Dp42410.html?page=9#manual .

I hope this helps.

Cindy Wells

The main board has some issues and would need to be replaced to fix the issue

Older sets had vertical and horizontal size controls. If you have the horizontal size control, turning it counterclockwise will reduce the size of the picture horizontally and reduce the overscan.

I did not find the Overscan, however I changed the TV settings, hdmi to digital, and this worked. Also, I did have part of the screen missing. I called the Tech Support to setup my Mac Mini and they adjust the Overscan on the Mac System Preferences, all is fixed. Thanks for yawl help.

I had to call Sanyo on this same problem, and I just wanted to help you out on this. When you turn on the the TV and it asks for home or store, chose home then do the channel scan. After the channel scan completes, switch to your tv source, hdmi1, then turn off the tv and back on and it should just go straight back to hdmi1. Let me Know if this works!

im have the same problem now... you get it fixed?

The "Best Solution" fixes a problem that is unrelated to the original poster. anononline19's solution is to fix the entire OSD being locked (displays OSD Locked when the menu button is pressed).

Original poster's problem can be fixed by changing your graphics card's "overscan" settings.

Overscan on ATI cards:
http://nigelt.wordpress.com/2009/09/21/overscan-options-in-catalyst-9-9-on-windows-7/

Overscan on nVidia cards is currently not supported.

I have had what is fundamentally the same problem. I have a desktop PC that I am plugging in to my Panasonic Viera TX-32LZD80. I am using DVI connection plugged in to HDMI port.

The solution is fairly simple; use the Menu button on the TV remote to get to the Main Menu for the TV and then select Setup which should be the fourth of four options. This will get you to the Setup Menu for the TV for the current channel. Look for the Picture Overscan option, it will very probably be set to On if you have the problem of %5 or so of display being missing on all sides.

Switch Picture Overscan to Off.

This immediately should solve your problem. A note of warning on this is that I suspected this was the problem but when I first looked at the Setup Menu I could not find the Picture Overscan option.

If you are unable to find the Picture Overscan option then trying fiddling with the Aspect settings. You will probably find it set to Auto. Switch it to 16:9 and you should find the Picture Overscan option will be available from the Setup Menu.

Hope it works for you.

Switch to that input, and run the Auto Convergence for that input (Setup menu on the TV, Convergence). Convergence settings save for that particular input.