It started 3 days ago... after switching on the back light would flash on and off for a period of time. At first it would only be for a few seconds but it's gradually taking longer and longer to stabilize.
A quick google and apparently it's easily fixable and a known fault that occurs after a few years on similar models. Most commonly it's 3 capacitors that either blow or become bloated and need replacing.
The three capacitors in question are grouped together the labels and values are the following:
C110 = 25v 820µF
C111 = 25v 820µF
C112 = 25v 330µF
First make sure the surface is free from anything that could scratch the screen. Place it flat, screen side down on the edge of a table so that the stand overlaps the edge.
Remove the base by unscrewing the three screws indicated and sliding out the base.
Remove the three screws at the bottom of the screen.
I found this next bit the hardest part of the process, be gentle and patient.
The rest of the cover is held together by plastic clips so carefully work your way from the bottom to the top levering open with a thin blunt object like a knife or preferably something strong and plastic so u can't damage the outer casing. Be aware of the cable attachment shown below which will be detached later. Once you reach the end of one side, do the same for the opposite before working across the top.
Once done, lay screen side up and lever open gently and cautiously from the top. Pull the tape half off to free up the cable and u should now be able to lay both parts flat like below.
There are still a few cables attached to the screen. Hold together the back panel and the inside frame and carefully turn over so it's screen side down once more. Remove and put aside the back casing.
Detach the left side cable coming from the front panel input pcb indicated in the next picture. You'll need to pinch downwards and pull with either fingers or a set of pliers. You can now put aside the front panel.
Then remove the bottom set of cables by pinching the sides and pulling.
A second set of cables are hiding behind a detachable cover.
Push the cover and the base towards each other and lift to unhook as indicated in the above picture.
You should now see two sets of two cables. Pinch down and remove one by one.
A reference for when you put it back together:
Pink Inside, Blue Outside
You should now be able to lift the housing from the screen. Put the screen safely to one side.
Turn the housing over as shown. We are interested in the left pcb.
Remove the cable from the 2nd pcb, as indicated. This is important as it's soldered directly to the other pcb. Get a finger undeath and pinch upwards and pull.
We then need to remove the three screws indicated. The top screw includes a metal strip that will need levering out slightly and then to the left.
The pcb should now be free.
Here's what my three bloated capacitors looked like.
I removed them using a soldering iron and a solder sucker.
Then insert the three replacement capacitors making sure you have them the correct way round. Negative is shown by the light blue line and/or by the longer wire of the two and the correct orientation is also shown on the pcb. Check my above picture to confirm.
Turn over, spread the legs to hold it in place and then solder and trim.
All done, now put it back together again.
I now have a flicker free monitor. Hopefully someone in a similar predicament will find this useful... to think I almost bought a new monitor from Aria.