I just thought I would give people an update. My repaired 606 has been working fine for a few weeks now after they replaced the HDMI board and carried out a firmware update.
I decided to make my fan modification a little more permenant, details as below:-
1 x 120mm Computer fan (Quieter the better)
1 x 120mm Dust Filterhttp://www.akasa.com.tw/update.php?t...odel=GRM120-30
1 x mains to molex adapterhttp://www.kustompcs.co.uk/acatalog/info_1778.html
1 x ONECLICK TVA-106 INTELLIPLUG FOR TV AND AV SYSTEMShttp://www.oneclickpower.com/store/g...ow/TVA106.html
2 or 4 long fan screws
Remover outer case, 6 screws total, 2 rear, 2 left side, 2 right side.
Drill a hole in the right side of the vented cover at the back (just large enough to pass the fan connector through)
Place the dust filter on top of the vented case and mark where the holes need to be drilled. They already line up with the slots but need to be widened to let the fan screws through. Drill the holes.
Place the fan on the inside of the case and the dust filter on the outside. Fix the two using long fan screws from the outside. This will allow you to remove the outer dust cover without having to unscrew anything as it just unclips.
Fix the excess fan cable out of the way using either electrical tape of equivalent. Feed the connector end of the fan through the hole in the right hand side of the vented cover. Be careful not to damage the cable on any sharp edges. Install a rubber grommet or use a glue gun to hold the fan cable central in the drilled hole to avoid it getting damaged.
Connect intelliplug to mains outlet.
Connect mains to molex to intelli plug.
Plug fan into mains to molex adapter.
Plug amp into master socket on intelliplug.
Set-up intelliplug IR to recognise command to switch on.
Note: This install can be done without the dust filter making it nearly invisible from the outside but I chose to live with the slightly reduced airflow for cleaner amp internals.
Hope this is useful to someone else.