Inpiroon 560s issues but need corfirm

Cannot add product to this post as product is not found..  Out of warranty,..

In any case, just wish to confirm troubleshooting and correct conclusion.

In my Dell Inspirion system we had an issue where PC was freezing, opened it up, and at first I thought it was memory problem..  (2x 4 all full) = 8 Gig Max

So I traced it down to Slot 3,, removed DIM so I only have 6Gig, and booted...  Started fine, so to check further I moved a perfectly functioning module to Slot 3, and it failed to boot

Am I correct then this is a replacement motherboard issue since Slot 3 is bad ?

What's interesting is PC with memory in Slot 3, the PC powered up (white = on) power and no beeps of any kind but display won't give output..

So ya, it may look like graphics issue (onboard),b ut I think its Slot 3 issue on motherboard.

Can anyone one confirm, its the right path?

By the way, I checked all modules via BIOS reporting correctly and they do... Its just any module that goes into slot 3 prevents PC from booting.

Take not out, and its fine.