|Initial problem was limited to being 'outside of Windows', but in post #3 I mention that nothing now appears on the main screen.|
By 'no ghost of XP booting' I mean that I cannot see anything on the main screen - from reading up elsewhere on the problem, if the backlight or inverter fail then it is still possible to see the (booting) image, especially under bright light.
The external screen is now recognised as the primary display, but the secondary display is greyed out, though the system does still say that it is 'attached'. Trying to toggle between them it immediately reverts to the external display.
The initial flash is immediately upon pressing the power button - well before Windows takes over, There aren't any display settings in the BIOS and the Windows display settings are as described in the previous paragraph.
Coming to the conclusion that this is a definite hardware problem that developed from the initial errors, and looking on EBay it doesn't seem I'm alone with having this unit with similar problems.
Thanks for responses anyway.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd