I'm trying to explain more about my issue here: there's three separate issues but both affect image and result noisy:
1. Coloured vertical lines
2. FPN
3. Cross Hatching
And I'm trying to write more point by point:
1. Coloured vertical lines
This was officially confirmed that my camera is damaged from BMD support. This issue affects even images are
bright(still quite visible while around 50% exposure). You can see the attachment, some pink and green lines appear on the screen even shoot with body cap.
2. FPN
There are some color noise in around 5-6% exposure(Film range) with ISO1600. They will go away when more light comes into the camera(or you can say, they become hardly to notice). Capture from SDI/Record RAW/Record ProRes/Calibrate sensor/Downgrade or upgrade firmware(3.0,4.3.1,4.4) won't help.
3. Cross Hatching
I'm starting to suspect my camera also suffer from cross hatching after I saw this post(
viewtopic.php?f=2&t=51936). The big difference between cross hatching and FPN is: FPN is color noise and cross hatching is luminance. As you can see there're many many white/grey cross pattern appear on the first untouched ProRes image. It becomes conspicuous when you scale down the image.
I've decided to return this second hand camera to the seller since it's confirmed as damaged machine. But I still want to hear more because I still want to buy another URSA mini.