...you take the lid off...
Oh.
:blink:blink: :stare:
Right...
If you really don't want to open the case, the reboot sequence should show you the GFX card splash screen, then type of motherboard/BIOS, total RAM installed (but not its configuration) and the HDD type and capacity. Failing that - you may need to get into the BIOS and disable a splash screen - a diagnostic would help.