As in earlier post concerning this problem which I explained that I installed a refurbished system board in my Dell Inspiron 1501 laptop. I managed to get LCD screen on Dell 1501 laptop to function by reconnecting LCD wires to new system board. Now though, when system starts ,the screen show the Dell insignia and then there is the message ,'a disk read error has occured,pres ctrl+alt + del to restart. I followed these instructions and the same message keeps appearing. I tried t reposition the HD but that doesn't fix problem. This unit run Vista 32 bit. It has a AMD Semprom 3600 1.8 GHZ processor. Any Ideas to repair problem would be welcomed.