The resistance of the usb port?
There is a suspicion of closed contacts in the ports of the laptop. Namely a shorted d+ and d - contacts. What resistance must be d+ d-? Checked the power contacts, increasing resistance(capacitor charge) is normal. Check date contacts 19 Com does not read any pendrive or mouse...
2 answers
What you this information will give? Resistance there is certainly nonlinear. All you can check is to avoid breakage, or circuit.
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