How will you determined that AC is twice of DE?
More complex circuitry that performs the opposite function, that is converting DC to AC, is called an inverter . Before the development of silicon semiconductor rectifiers, vacuum tube thermionic diodes and copper oxide- or selenium-based metal rectifier stacks were used.
The AC power adapter type cannot be determined. Dell Inspiron 1545. First thing to try is a new Dell AC adapter – if that doesnt fix the problem, replace the power jack (see link below). And in the unlikely event its not the adapter or the jack, the mainboard will need to be replaced.
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