When to check Voltin Section
This section we check when laptop or desktop not gets turn on after pressing power button means laptop is in dead condition.
What to do if volt-in section have problem in laptop or desktop
If there is voting section problem then we should check first 19 volt supply of adapter.
Then check from dc connector via coils and mosfets upto CLR point. On CLR you will get two conditions :
- No supply
- Less supply
If CLR not getting voltage then first check Second Mosfet U2’s input and First Mosfet U1’s output for voltage via multimeter. If voltage is not coming here then Mosfet is faulty or check for voltage on Second mosfets gate U2 which should be plus 6 voltage if p channel mosfet is there. Mostly Second mosfets are p-channel mosfets.
Or else check for charging IC for why it is not sending voltage for gate which can also be result of faulty charging IC.
If First mosfet U1 output not have volt and second mosfet U2 input not have any voltage then check whether first mosfet U1 is faulty or not. Also check for first mosfets U1’s gate for proper voltage and any fault component for not coming of that voltage.