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Custom Resolutions & Refresh Rates on CRT TV (CRU)
RVZ:
I'm trying to connect my pc to an LG 29FS4RLE CRT television. I've tried both Nvidia (GTS450) and ATI (6000 series) cards, both HDMI to HDMI-to-Component transcoder, to component input on TV.
I'm struggling to get a clear image though, just getting a 'rolling / scrambled' image. On the ATI card there is a resolution of 720x576 @ 25hz, which gives an clear image, but it's flickering quite a lot with an overscan. On the Nvidia card I once managed to get very good images, without flickering, but every time I rebooted it would be gone again. I used CRU for setting up the custom resolutions and refresh rates, but after all this messing around and swopping cards, I can't get it working again.
How can I find out what the settings should be for setting up different refresh rates?
Arroyo:
--- Quote from: RVZ on February 02, 2020, 12:22:10 pm ---I'm trying to connect my pc to an LG 29FS4RLE CRT television. I've tried both Nvidia (GTS450) and ATI (6000 series) cards, both HDMI to HDMI-to-Component transcoder, to component input on TV.
I'm struggling to get a clear image though, just getting a 'rolling / scrambled' image. On the ATI card there is a resolution of 720x576 @ 25hz, which gives an clear image, but it's flickering quite a lot with an overscan.
--- End quote ---
Assuming your TV isn’t very unique that resolution is too high for a standard definition TV. Avoid continuing that resolution as it can damage the circuitry.
I see from one of your earlier posts that you had planned on using CRT_emulation driver. This is a driver written for Windows that will allow you to access the lower resolutions you need for the TV. This driver is specifically for ATI cards, so the NVIDIA is no good.
If you follow the tutorial online exactly this will help you get the resolutions you want. AND setup proper refresh rates.
You also should read up on connection types to the TV. Your ATI card should have a D-Sub (VGA) output. This will give you analog out. The HDMI transcoder could work but I’d be careful to make sure it doesn’t force a resolution output. Normally you’d get an analog transcoder and use the D-Sub connection to get the signal to the analog transcoder and then to your TV.
RVZ:
--- Quote from: Arroyo on February 03, 2020, 08:20:30 am ---
--- Quote from: RVZ on February 02, 2020, 12:22:10 pm ---I'm trying to connect my pc to an LG 29FS4RLE CRT television. I've tried both Nvidia (GTS450) and ATI (6000 series) cards, both HDMI to HDMI-to-Component transcoder, to component input on TV.
I'm struggling to get a clear image though, just getting a 'rolling / scrambled' image. On the ATI card there is a resolution of 720x576 @ 25hz, which gives an clear image, but it's flickering quite a lot with an overscan.
--- End quote ---
Assuming your TV isn’t very unique that resolution is too high for a standard definition TV. Avoid continuing that resolution as it can damage the circuitry.
I see from one of your earlier posts that you had planned on using CRT_emulation driver. This is a driver written for Windows that will allow you to access the lower resolutions you need for the TV. This driver is specifically for ATI cards, so the NVIDIA is no good.
If you follow the tutorial online exactly this will help you get the resolutions you want. AND setup proper refresh rates.
You also should read up on connection types to the TV. Your ATI card should have a D-Sub (VGA) output. This will give you analog out. The HDMI transcoder could work but I’d be careful to make sure it doesn’t force a resolution output. Normally you’d get an analog transcoder and use the D-Sub connection to get the signal to the analog transcoder and then to your TV.
--- End quote ---
Thanks for the reply. Yes, I was looking at using the CRT emudriver, but I'm struggling to find a transcoder for it. It's difficult getting international shipping through our local postal service, everything seems to go missing along the way. I've ordered 2 VGA to component transcoders from ebay, which should work, but none of them arrived yet.
So until then, I'm trying with the hdmi solution, even if it's not the same resolutions as what I can get with emudriver.
How can I prevent the CRT from getting damaged from playing around with the resolutions and refresh rates? And how easily can it happen?
Arroyo:
--- Quote from: RVZ on February 03, 2020, 11:56:37 am ---Thanks for the reply. Yes, I was looking at using the CRT emudriver, but I'm struggling to find a transcoder for it. It's difficult getting international shipping through our local postal service, everything seems to go missing along the way. I've ordered 2 VGA to component transcoders from ebay, which should work, but none of them arrived yet.
--- End quote ---
Where are you located? Does your TV have a Scart input?
--- Quote ---How can I prevent the CRT from getting damaged from playing around with the resolutions and refresh rates? And how easily can it happen?
--- End quote ---
Until you can output a 640x480i (or 640x240p) signal as confirmed by your graphics card in Windows video output then I wouldn’t connect your TV. That won’t happen until you’ve gone through the steps of installing the CRT_emulation drivers and use your ATI card. You would need to select the HDMI output if that is available, but I haven’t done that before, only the VGA. I know that on some cards this is an option, but usually the HDMI cable is connected to a Digital to Analog converter and then to the TV from there.
First thing I would do is get confirmation that the drivers have installed properly and that you get the correct setting for resolution output. Then worry about the transcoder. Which one did you order?
RVZ:
I'm in South Africa. No scart. So far I've ordered this one last year already,
https://www.ebay.com/itm/174085772114
And this one last month,
https://www.ebay.com/itm/193049027689
Is it possible that the TV might already be damaged, or will it not display anything if it is?