$AUD300 will get you more than a 17" LCD; even $NZ300 will get you a 19".

You'll probably be better off getting a new monitor. Keep in mind, moreso with monitors than most other parts of your computer, you pay through the nose for a brand name. Especially Philips, don't bother with those.

You will likely find a little known brand supplies parts to the bigger companies, who rebrand and charge more for the same product. (Take Sony Bravia TVs, for example, they use Samsung panels and a 40" retails for $NZD4500, but a Samsung 40" using an identical panel retails at $NZD3200.)

So, I recommend you go for a lesser known manufacturer, such as Polyview, Hanns-G or Chimei, etc. You'd obviously want to make sure the quality is ok: brightness, response time, contrast, etc.
My 19" Polyview is fantastic, so if you need an endorsement, there it is.

Otherwise, if you'd rather get it repaired, you can take it to most small-time computer vendors, who'll give you a cheap diagnostic, to find out if it's worth it.