I began having problems with my 5 year-old Dell computer about a year ago. When starting-up the computer, I often get a blank screen that reads: "OPERATING SYSTEM NOT FOUND". I found that by opening the housing (the thing that sits on the floor, you know!) & disconnecting & reconnecting each of the ribbon cables (there are maybe 4 connections that are accessable) that the problem goes away & I am able to get to my desktop. This used to happen maybe once per month, but I now go through this routine at least once per week. Is there a simple remedy? Are the cables easily replaced? Or, is there maybe some type of liquid contact enhancer that might help? Any ideas would be appreciated! I've thought about getting a new computer, but my present machine (Pentium 3, Windows 98, 128mb) has served me well & I'd like to run it for a few more years. P. S. Yes, I've backed-up all of my important files!