I recently replaced a dell xps 400 motherboard with a refurbished one. Now my question is, can the motherboard be the cause for me getting this error message:" Error initializing PCI Express NIC bridge. NIC Failure"? Ive replaced everything else with new parts ex: video card, power source, memory, heatsink, even new fans. I went into the bios and disabled the intergrated NIC & still get the same message. Took out the CMOS battery, put it back, same results. Even reset the bios by the jumpers. Nothings working. Is this a case of a faulty motherboard?