Check that both the 24-pin and 4-pin CPU power cables are completely locked into place.
Dell does not release a separate manual for the MIh61R alone. Instead, the motherboard documentation is embedded inside the . However, here is where to find official PDFs and community resources: placa mae dell mih61r mb 10097-1 manual
2 x Internal USB 2.0 headers (supports up to 4 additional front panel USB ports) Check that both the 24-pin and 4-pin CPU