Thanks for the reply, UTR.
Does/did your D620 have integrated graphics (soldered onto mobo) or discrete like my NVS140?
What fan utility are you using and where did you get it?
From what coolcolors was saying it sounds like reseating the gpu with thermal paste made it run cooler, but did not fix the screen going blank problem.
I'm hoping coolcolors is still around so I can get his response on what replacing the inverter and possibly cables did for the issue?
I also heard that there is more than one inverter for the D830, so I'm wondering how do you determine which one to get?
I have my D830 set up with a docking station, monitor stand and attached scanner, printer and sound - duplicated at two locations so I'm keen to get it working again for when I'm busy (soon!).
In the meantime I'm running a E6520: nice machine but have invested a lot of effort in my D830 setup so want to run with D830 still.