Ok, here's what happening from the get-go:
Start computer and it seems to be booting. Black screen, monitor shows blue light like it's getting a signal, but there are no images, no cursor, no nuttin.
After doing a manual shutdown, monitor cable unplugged on the back (including power cable), start again and it's all good. This happened twice with the same actions and results.
Any ideas? Monitor? Monitor cable? Power supply?
Edited to add: We are bringing home the monitor from work tomorrow. If it works, that tells me it's either the monitor or the cable on mine.