Hello.
My English is not very good. So I used GoogleTranslate. I apologize in advance for the mistakes.
I have a strange video problem on my amiga 1200 computer. Motherboard model 2b
When the workbench screen arrives during a cold start, the image disappears.
I tried it by starting the amigatestkit with gotek driver. The same thing happened in the video test section.
The computer can be restarted with a reset when the video signal is absent. After a few reset attempts, everything returns to normal.
Hardware connected to the computer, aca1233n + (RTC), compact flash hard drive and gotek drive.
I took the Aca1233n card and tried it. There was no problem.
I re-inserted the card and the amigatestkit video test again resulted in a black screen.
The Amiga 1200 has recently been refurbished. New capacitors installed. Timefix also made. (E123C and E125C)
I also cleaned the amiga1200 card slot contacts.
I am using amiga with os3.9 bb4.
The power supply I use is meanwell RT65B.
You can also watch the youtube video below.