Anyone able to recommend a decent TV repair place in Dublin?

I have a Black Diamond MD27LCD tv and just recently it's developed a problem whereby after an indeterminate time of normal operation, the image on screen will freeze. By choosing a different source and then returning to the original one, normal operation will resume for another period of time, before freeze-framing again a little while later. When the problem first developed, I tried switching from SCART to FAV input, but the problem persisted.

Seems like there ought to be a relatively simple fix for this.