Good to know the delay is normal. I will proceed with the long memory test.

I did try running just single pairs of SIMMs to see if I received startup errors. However as the startup error is sporadic, I did not receive any errors when I did this. I do think that I have identified the pair of SIMMs causing the trouble after a trial yesterday evening. I am going to install these SIMMs in a few mins and run the "Long" memory test on them. I will post my findings when I am finished.