Charles Schuler wrote:
I would clean up all the contacts first.

Also, check those plastic latches ... they can break. One of the
reasons that I hate to work on computers.

The specific slots used can be an issue. If the number one slot is empty
you'll get an error. For example. if there are 4 slots, 2 DIMM's would use
slots 1 and 3. They may be color coded.

I was building a computer a while back and ran into this - hadn't heard of
it before.

Mark Z.