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If I install memory into every DIMM slot the server will not boot, no display will be shown via VGA. ILO 2 detects these slots' memory as being "Not installed". If I remove the memory from the two slots it will boot.

These slots are 6D and 8D.

What should I do?

It's 8 x 2GB DIMMs. All the same type.

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You removed 2 DIMMs and it booted. Can you use those 2 DIMMs (by removing two others) and seeing if it still boots? It could be a bad DIMM – mfinni Sep 13 '13 at 16:42
@mfinni still boots which ever DIMMs are in, it's not a faulty DIMM, checked them all. – ser567wil Sep 13 '13 at 16:43
Could be a bad slot on the board, too. Can you use those slots in a valid non-full config? – mfinni Sep 13 '13 at 16:45
@mfinni yeah that's the weird thing they work and the BIOS recognises the memory in those slots. – ser567wil Sep 13 '13 at 18:18
Latest BIOS installed? – mfinni Sep 13 '13 at 18:22

You should call HP Support and open a ticket.

If you don't have support, you should try these DIMMs in other slots.

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DIMMs work in other slots, the DIMMs are fine and so are the slots. – ser567wil Sep 13 '13 at 20:06

My thoughts would be:

a) Working with pairs of DIMMs, boot the server with a SmartStart CD and run the memory diagnostics. Repeat for each pair.

b) Boot the server from the terminal release firmware CD for the G5 and update the BIOS, Etc. (just in case)

c) Like others have said, go down the hardware fault route.

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The DIMMs work fine in every slot, Updated all the firmware. Not sure what else to do, the slots work. – ser567wil Sep 13 '13 at 20:06

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