I believe the mobo on this notebook (not mine) was damaged when the residential power grid was hit by lightning. Ethernet port is no longer active and there are other indications of damage, but the HD seems operational. The wireless router to which it connected wirelessly was fried. I have access to a replacement mobo, and I have done enough computer rebuilding and repair to believe I might be able to handle this replacement. My question is: Is the current setup tied together so that the HD, OS, etc will not function with the replacement mobo (from a vendor) even though it is the same model, etc. I have System Restore Disks created before the NB was damaged. A few years ago I encountered a problem installing a replacement mobo in a desktop when I had not purchased the mobo directly from the computer mfr. Fortunately, a tech walked me through the process to prep it with temporary access to a website. Does anyone know whether I am likely to encounter a similar problem here?