Servicing Personal Computers, 3rd Edition

110 Servicing Personal Computers

To assist readers, Table 3.2 shows some typical CPU supply pin connections. In all cases,

voltages should be within 5 per cent of that stated. Where this is not the case, it will be

necessary to carry out a detailed examination of the power supply unit.

We should now have excluded the mains supply input, the d.c. power supply, and the

internal connectors from our investigation and, depending upon the outcome of the initial

checks and the resulting display on the VDU, there are three remaining options, as was shown

in the flowchart of Figure 3.3. We shall now examine each of these options in

turn,

starting

wit ...