Phillips 28PW6006/5, brightness flash and soft picture.

[matchfacts]

Hi all,

For a while my Philips 28PW6006 has been intermittently flashing the brightness.  The whole screen would show a high change in brightness level before returning to the preset levels.

Now after this has occurred, sometimes the screen will show a blurriness at the edges of the screen and what looks like a ghosting of image - but only at the edges.  It's not like a registration error as a white line looks like it's repeated not like it's dividing in R G B.  Also, flyback lines can be seen in the blacks at this point.

Any ideas if this is a simple fault or an accumulative effect of a number of errors?