Region1 flash

[BrynTeg]

Some times during a regionn 1 movie i can see the screen flasing just a little,this is evident in some discs and not some,is this just a quality issue with region1 dvds,i have a good quality dvd player and w/s television and use a £50 gold scart to super vid connector..any advice

 

[Mr.D]

Layer change ( if it happens once) macrovision , 50Hz/60Hz interaction between the incoming dvd signal and the output pal signal from the tuner stage on the TV ( snip pin19 at TV end)

all possibilities