My Dell Optiplex 755 is showing a blinking orange light with Diag code 3. As referred by diagnostic guide for optiplex, it is a processor problem. But can it be the motherboard? I have another Processor (Pentium D 945) But I don't think q45 supports it.
Update: Diag lights 123 and on screen message "Alert! Chipset heatsink not detected"
Update: Diag lights 123 and on screen message "Alert! Chipset heatsink not detected"