As a preface to what I discovered wrong with my machine, let me relate a little bit of background information. First of all, no recent activity had taken place to damage the computer. For example, I had not recently inserted a printed circuit board, or memory chips, etc. I had not built up a static charge and then touched my computer, discharging thousands of volts into it. It had worked one night, and simply did not work the next. Based upon this, I suspected that there could not be too much wrong with it.
A brief description of the symptoms are in order. The computer, when turned on, would start its' power-up sequence. The hard drive would move its' heads with a short brripp-brripp. After a few seconds, the cycle would repeat. The floppy drive was not active yet, and the screen was gray. The computer was not totally dead, however, as it would respond to a Ctrl-A-A soft reset sequence, but would not get past the harddrive's brripp-brripp.
In discussing my problem with a friend, it was suggested that I look at the CPU daughterboard as the source of the problem.
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