Oldies wrote:...
>I Tried adding a matching module, no post.
>I Tried moving new module to 1st slot, no post.
...
Hi,
Most likely incompatible RAM. Is it SAME specs and same brand ? Please try:
http://www.crucial.com/usa/en/hp-pro-3000-small-form-factor/CT5510206
At least they guaranty their RAM will work.
Regards.