Weak Power-Supply



The reader may wonder how I know this.





I might also add, that the maximum number of milliseconds for which the computer can run entirely off its supply-capacitor, that is, with the A/C input at zero, is adversely affected by how nearly-overdrawn the power-supply is. A smaller power-supply will also tend to have a smaller supply-capacitor, such that if the current being drawn from it by the computer corresponds to 90% of capacity, then this can only continue for a disappointingly-short number of milliseconds, such as maybe 100ms .

If the power-supply has a higher capacity, such that the same computer is only drawing 50% of what the supply can deliver, that supply will also have a larger capacitor, so that if there is a dropout in the A/C voltage, the same computer could keep running entirely from the supply-capacitor for a longer number of milliseconds, maybe approaching about 500ms .



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