is there a way to configure radeon7000 for TV output

[yufan]

hello all,
the graphic card in my box is radeon 7000 and it supports tv
output.howeverwhen i connect my tv to the graphic i cannot even see
the desktop of
FC4.the tv screen just keep refreshing so that i can only see some blue
colur which is the main colour of my background wallpaper. so is there a
solution to this?
thanks in advance.
yufan
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