OK, This is a painful story but here goes. Bought an HP Pavilion 735N used for my son to use for school. Needed a power supply but not much $$. Loaded CD's for the unit and everything was working great UNTIL the apartment he lives in had a lightning hit. Power supply was warranty replacement and still no go, so I bought a new Motherboard. ASUS A7N8X-LA model. Installed the board and the computer runs again but the back-up CD's get a message that they are not for this computer. I suspect it is something in the motherboard that is not set correctly to recognize it as an HP Pavilion 735N but have tried all I can think of in updating BIOS, downloading from HP site, etc. all to no avail. I have since loaded a version of XP Professional but have no driver for the Realtek 8201BL LAN or the Photo Card reader. Any advice on how to set the motherboard so that it is recognized as an HP Pavilion 735N which would allow me to reload the original system or where I can locate a PHY Driver for the Realtek 8201BL? This is driving me crazy that I can't get it to recognize the board which is the exact same model number as what I removed from the computer. Any help would be appreciated.