Ok, here's an update. I swapped the wires over on the vga cards. The text screen is now on the right of the pendant and the graphics screen on the left. The text screen comes on straight away and the graphics screen is slow to warm up. So it would appear that the problem is staying with the left hand monitor.
To prove it out I put the wires back to the original positions and then swapped the complete monitors round. The problem moved with the monitor and it is now the right hand screen that is slow to warm up. There is obviously nothing wrong with the cards or power supply, it's the monitor itself that's at fault. I had them both serviced and repaired less than 2 years ago. I was posative I changed them round some time ago to see if the problem moved with the monitor, maybe I didn't. So, any ideas on what could be causing the monitor to be slow to warm up. They are colour monitors and the blue and white 24 volt wires are connected. |