macjax

Hey djglish, actually no and a good question. I was only able to get Low and Med resolutions. High was greyed out. Now I don’t know exactly why but just figured the sync combiner couldn’t handle it ? Not really sure. Maybe someone here can advise ?

Guys, thank you for your posts ! I was able to get a nice clean sync using the GBS 8200 and an Extron RGB 192 sync combiner I had laying around from like 15 years ago ! LOL ! Anyway, works great !! Thank you !!!

Thank you but I don't believe that is my issue has both my 1040ST and 520ST have the same exact issue. Chri, I think that is what I need to do ! I have the exact same GBS 8200 board !! I'm just curious because the person on eBay I purchase the ST to VGA cable from has sold tons of them and when I explained to him what was happening, he thought the cable he sold me might be bad ? Anyway, I would love to try what you did !! I also have the esynic VGA to HDMI converter which also didn't work. It was recommended by this youtube video below. His video shows separate H and V sync which is how the cable I have is wired. He did mention that the monitor is dependent on what signal you send it and I know my HDMI monitors don't support 15khz. What do you think ?

Greetings All !! I have picked up a monitor cable (DIN 14 pin I believe) that goes from the ST computers to a VGA connector. I also have an arcade VGA input convert the converts the 15khz to standard VGA. The convert I have and monitor works as this same setup works perfectly for my Amiga 500. However, when I use this cable with my ST1040 or ST520, I get a "rolling" image like there is no vertical sync. I have checked both the H and V sync pins on the cable and both have continuity. I have attached a picture of the image. I am thinking the cable must be faulty as the Amiga 500 cable and this same setup works great. I also have a recommend VGA to HDMI converter that was shown in a youtube video working with a similar cable but the HDMI display will not even get an image. Any ideas is greatly appreciated !!! Thank you !!!

Ok. Thanks a lot guys. I will do a complete cleaning and reseating of all ICs. Also, this Atari would not boot when I initially received it. Turn out to have a bad CPU card which I have replace with one via eBay. I will post my results tonight after cleaning/reseating chips.

Actually, replaced the POKEY and both key-in/key out 4051 IC's with known working pulls from an 800 and still have same issue. I am assuming now possible keyboard itself might be the issue ?

Ah, makes sense !! Thank you !!!

Hello, This is my first post, so I apologize if it's not in the right area. I have a Atari 400 computer that I restored and have working with the exception of a keyboard issue. If I boot the 400 with no cartridge, the Memo Pad comes up but I cannot type anything. None of the keys work except the system restart key located on the top right of the keyboard. If I insert a BASIC cartridge, I get the READY prompt but if I press any button on the keyboard, the 400 locks up and the screen kinda gets random horizontal block lines across it. Sorry, it's hard to explain but I can attach a photo. Was hoping someone can point me in the right direction in what IC I should try to replace first? Maybe the POKEY chip but the controller port works as game cartridges seem to work with the controller port #1, which is tied to the POKEY chip. Any help would be greatly appreciated!! Thanks!!