Second monitor failure

I am running two monitors off my Win 10 HP Pavillion p6-2120ea 64bit machine.

The graphics card is Raedon HD 4300/4500. The monitors are an Eizo S2243W off the DVI port and a Dell E2011H off the VGA port.

Today the Dell reports no signal from the computer. The Eizo is running as normal. I have checked that Win 10 display is extended to the Dell monitor. "Detect" reports "Display not detected" Device Manager shows no problems. The Dell was working 4 days ago.

Could this be something to do with my cancellation of an update to the AMD board, on this machine; everytime I have tried to update the AMD software, for over a year now, it has told me it is no longer updateable.

Through display adapter properties I am told that the drivers are the latest.

Look like DVI is ok but VGA is not?

Any advice please?

Interesting. I undid extend display and on the, now, single Eizo screen, and found Firefox was hanging awaiting action. When I cancelled that message the Dell worked.

However I still seem to be having problems as two reboots later Dell failed again; temp. undoing extend screen and letting it revett again resolved matters? But initially the main screen loses its background wall paper i.e. background is black but if I move cursor around over the screen all the wall paper returns?