I recently picked up a (seems like) fully functional Apple IIc on eBay to play around with. I do have a modern TV that has RCA input port that the Apple IIc supports. However, when I plug in the Apple IIc to the TV and turn it on, the display briefly displays the Apple IIc boot up screen (black screen with Apple IIc text on top) for a second, then everything turned into snowflakes, which means the video port on the Apple IIc is definitely not bad (I can replicate this every time).
What else can I do to make this Apple IIc work on my TV?
I also have an RCA to VGA adapter coming, not sure if that will help though.
I found out that if you switched to another input source then switch back to the input sources the Apple IIc is connected to, it will display the correct text for a fraction of a second, then return to the static screen. I've also tried running the diagnostic (holding both Apple key at startup), it says system OK (I managed to catch the text during the fraction of second which it appeared correctly).
Here is a picture of the static: