720p Plasma Over HDMI is either Overscanning or Not Displaying

[hicksman]

Hi, new to Mister, just getting things set up. It's just the main board, completely updated, over HDMI to my Pioneer PDP-4270HD Plasma TV

I noticed the content on the left side and bottom of the screen are cut off, so I investigated the INI and noticed that I'm running with Option 0, 1280x720@60. I think I'm witnessing "overscan" where the signal is accepted but only the native resolution is shown, leaving the rest cut off. (I don't see a way to disable it on my TV)

I consulted the TV manual. It says the TV has 1024x768, which is odd because that's a 4:3 aspect ratio and this is clearly a 16:9 TV. (The more expensive 50 and 60 inch models are 1365x768 which seems more reasonable)

Confused, I selected option 1, 1024x768@60 and that lead to no signal when I rebooted. I went back to the TV manual and checked to see what other resolutions I would select. Here's what it said:

Input signal correlation table
1920x1080i@59.94/60Hz
720x480p@59.94/60Hz
1280x720p@59.94/60Hz
720(1440)x480i@59.94/60Hz
1920x1080p@24Hz

I don't know how to select an interlaced resolution so i skipped those. The 720x480 works but everything is huge and it looks like its also being improperly rendered, with a lot of cut content off the side of the screen (Overscan?)

I noticed I could specify a custom resolution instead of the presets so I tried 1920x1080p@24Hz and that worked, the TV even recognized a 1080p signal, problem is that the screen is flickering. I added CVT and CVTRB but those didn't help.

So now I'm completely confused. I think the best option would be native resolution, but I'm not sure why its not displaying. Does anyone have any advice?

[Lloyd2084]

I have this tv. It does indeed have rectangular pixels. It has a cracking scaler though so you can’t notice it.

I had overscan too when I tried my MIster on it but I think I only tried the x86 core.

I get overscan using my pc over hdmi too actually, but it’s fine through vga. Maybe try analog?

[hicksman]

Thanks. I don't have the IO board, so I ordered an HDMI to VGA adapter from Amazon. We'll see. The manual does that that the TV is capable of doing dot-for-dot in PC Mode, which I assume is via VGA. I'll report back.

[hicksman]

That worked! Thank you Lloyd.
I got a HDMI to VGA adapter and plugged it in and now it's rendering perfectly.