MiSTer FPGA Forum

Hello everyone,

I am trying to figure out what's wrong with my Mister stack. I'm new to Mister and have assembled a stack with an IO board, the DE10-Nano, and the Analogue Board 6.1. Everything works perfectly when connected via HDMI to a modern TV. However, when I try to connect the Mister to an old Panasonic CRT using VGA to YPbPr, I get no picture. When SOG (Sync on Green) is turned on, I see a black screen with nothing displayed, as if it's attempting to show something but failing.

I attempted to connect the Mister directly with VGA to an old Dell PC monitor, and I encountered the same problem. It appears to attempt to display something but can't. I have tried adjusting various settings, including setting ypbpr=1 and using forced_scandoubler=1 when using the VGA monitor, but still, no picture is displayed. i have litrally tried every setting combo without any luck

I have also tested two different cables in the process:

https://www.selby.com.au/cables/video-c ... g9565.html
https://www.amazon.com.au/Monoprice-102 ... B001O8C6HM

Unfortunately, neither of these cables worked for me.

The board I am using looks like this:

Apart from considering replacing the Analogue IO board, what else can I try to troubleshoot and resolve this issue? Any assistance would be greatly appreciated.

I think ypbpr= is deprecated, try for component:
vga_mode=ypbpr ; supported modes: rgb, ypbpr, svideo, cvbs. rgb is default
composite_sync=1 ; set to 1 for composite sync on HSync signal of VGA output.
vga_scaler=0 ; set to 1 to connect VGA to scaler output.

For VGA:
vga_mode=rgb
composite_sync=0
vga_scaler=1

If your IO board looks like that then you have been sent a very cheap unfinished version. There should be headers for the VGA power and a whole row of headers in the bottom horizontal. These are essential for proper operation of the User port. It looks like a cheapo Ali Express/ Ebay board sadly.

You can solder those pins in but it would be great if people stopped supporting companies who supply such shoddy work

my orignal VGA board was from aliexpress i ended up buying one from MiSTer Addons but its doing the exact same shit. so now i got no idea what else to try other then a full reinstall of the SD