Hi!

My laptop AC-adaptor stopped working. It's output was 19V and 4.74A (~90W). I have one from another computer, also 19V but only 3.95A. Could I use this adaptor?

Someone have told me that I should get an AC-adaptor with same or HIGHER value, and another person told me that if it has higher power the computer could stop working, and that I should get one with same or LOWER value. What's the truth? And why...

Thank you

The voltage is consistant, the Ampage is "drawn" (pulled)
On a 3.95A, the laptop may not start, and can hurt the adaptor (and possibly the laptop trying to pull more amps)
On a 4.74A (the correct ampage) the laptop will draw the correct ampage
On a 5+ A (above the correct ampage) if it still states 19V then it will draw only the desired amount of ampage, and all will be good.

Note:
If the adaptor is a higher ampage, sometimes the voltage is also higher (which is not good)
The Laptop only pulls the ampage it needs

Thank you, that was a clear answer. I will not use that 3.95A charger...