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RE: Precision T7500 strange Pb7 message

The riser board requires several cable connections to be made, eg a power cable from motherboard to riser board, and cable from riser heat sink fan to riser board...

Sure you're connecting all of them correctly?

Check the instructions in the manual (page 86) for details of those cables and connectors. manual_en-us.pdf

And are you following the rules to populate RAM when the riser is installed (page 17)?

EDITED: And are you seating the riser correctly in its 2 slots?


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