hi,

would be grateful for any advice, have a 28" flatscreen avant which has just started to show thin horizontal lines across the screen, i think the lines are about an inch apart and they go all the way down the screen, sometimes you can hardly see them but other times (against a plain black background for example) they're very noticeable, i think the brightness/contrast may also be fluctuating when they're visible - does anybody know what this is likely to be?, e.g tube or power supply etc ?

thanks in advance

steve

You are seeing the flyback lines which should not be visable. Given that the brightness and contrast are fluctuating means the most likely cause is the tube, but it could also be a fault in the flyback blanking circuit.

You will need to have a B&O service centre look at it to be sure.

keith as always thanks for the quick and knowledgeable reply, guess i'll have to try and organise a callout :(

Hi could I ask what happened about your tv back in 2007 when you thought the tube might be going?  Was it that indeed and did you get it replaced?  Many thanks.

If the lines are white: most likely something with a louzy G2 control or HT/flyback electronics problem

If the lines are either blue, red or green: most likely the tube (easy to find out by a tech).