flickering display after warm up! Sometimes!

[onewatt]

Hi group.

I have a aoc lm700 tft monitor which shortly after switch on starts flickering between bright and normal display. screen info is not affected but the display has horizontal bright patches accross display area. I guess its to do with the back light control and may be a cap going down. it resembles the effect of a flourescent tube starting and once started wont stop flickering. How and what should I test?
Any help would be appreciated.
Cheers
Chris
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