After checking the top stuff and you still dont see 19 v, even though your power brick has 19 v when you check it seperatly, then you have a short to ground after the 2nd mosfet which turns on the security system in your power brick cutting your voltage untill you unplug and plug it back in from your wall socket.Important note 19v and ground must be seperate, you should never hear a beep longer than 1 second between ground and 19v.
if you have no voltage at the first mosfets input, then check if your multimeter is set up correctly by measuring a battery, if the multimeter is a known working one then check the power jack with your multimeter set to continuity, the middle pin is 19v so it is connected to the input of the first mosfet (yellow), and the ground is connected to the copper circle, if you dont hear a beep when connecting middle pin to input of the first mosfet, then check jack or cable if its ripped or broken somewhere, the same thing needs to be done to ground, outer shell of the power jack is ground, so check that with the copper circle if you hear a beep that means that its good, if not then the connection is broken.if you see no voltage then either one of the mosfets may be blocking it, so check the input of the first mosfet, its marked yellow in the picture.If you see fluctuating voltage like 17v then 20 then 15 then 19 and so on, if the voltage is fluctuating for more than 1 volt, then your power brick may be the culprit, if yes then check the power bricks output port with your multimeter, middle pin is 19v and the outer metal part is ground.If there is 19 volt then your first 2 mosfets have not failed and the fault lies in deeper in the motherboard, if you dont see 19 v then: Possible Solution(s): check if there is 19 volt after the 2nd Mosfet, see picture for where to place red probe of your Multimeter
A Picture of the first 2 Mosfets from the acer aspire v3-772g motherboard
0 kommentar(er)
