dell motherboard 13283-1 power problem

[chamalsb]

dell motherboard

13283-1 board

voltages of power connector (DC IN) very low, i think shorted. (no 19V)

when disconnected from board power connector voltage ok 19v coming.
help me to resolve this asap.

after removing PU4402 or pr4402 resistor, voltage of dc in is ok but not power on the board i changed that mosfet and resistor but not worked help me asap.

[Techtiger]

Re: dell motherboard 13283-1 power problem

what is the Voltage on the PU4402 S D G , after test IC PU4404 pin 1 2 20 6 5 16 voltage , PSID_EC Voltage ?

[chamalsb]

Re: dell motherboard 13283-1 power problem

pu 4404
pins
1-0v
2-19.4v
5-0v
6-0v
16-0v
20-0.361v

pu4402
s-19.4v
d-19.64
g-19.61

pr 4402 not in the board when checking

[chamalsb]

Re: dell motherboard 13283-1 power problem

what is the Voltage on the PU4402 S D G , after test IC PU4404 pin 1 2 20 6 5 16 voltage , PSID_EC Voltage ?

pu 4404
pins
1-0v
2-19.4v
5-0v
6-0v
16-0v
20-0.361v

pu4402
s-19.4v
d-19.64
g-19.61

pr 4402 not in the board when checking

[Techtiger]

Re: dell motherboard 13283-1 power problem

pu 4404
pins
1-0v
2-19.4v
5-0v
6-0v
16-0v
20-0.361v

pu4402
s-19.4v
d-19.64
g-19.61

pr 4402 not in the board when checking

You have to follow & Understand the Basic before you start to change components, What is your 1st Mosfet & why is it not switching? As for the Schematic AMD you 1st Fet is P -channel the Gate voltage is too high for the gate pass , check out the Pic & update the voltage

[chamalsb]

Re: dell motherboard 13283-1 power problem

can't understand where to where check voltages

[chamalsb]

Re: dell motherboard 13283-1 power problem

You have to follow & Understand the Basic before you start to change components, What is your 1st Mosfet & why is it not switching? As for the Schematic AMD you 1st Fet is P -channel the Gate voltage is too high for the gate pass , check out the Pic & update the voltage

can't understand where to where check voltages

[chamalsb]

Re: dell motherboard 13283-1 power problem


https://ibb.co/RbV6srL



https://ibb.co/nDcStCc

[Techtiger]

Re: dell motherboard 13283-1 power problem

can't understand where to where check voltages

oh dear he we go again 1st clean you bord with isopropyl alcohol PU4404 IC count ant-clock wise pin 6 is connected with PR4407 it's Resister check the voltage on both side after put the multimeter Ohms with out any power test Ohms on pin 6 20 of PU4404 find out PQ4402 Dual N-channel mosfet test voltage of all pins uplode a cleair Pic again near the 1st Mosfet (is sitll The Vedda Village exist Mahiyanganaya )

[chamalsb]

Re: dell motherboard 13283-1 power problem

oh dear he we go again 1st clean you bord with isopropyl alcohol PU4404 IC count ant-clock wise pin 6 is connected with PR4407 it's Resister check the voltage on both side after put the multimeter Ohms with out any power test Ohms on pin 6 20 of PU4404 find out PQ4402 Dual N-channel mosfet test voltage of all pins uplode a cleair Pic again near the 1st Mosfet (is sitll The Vedda Village exist Mahiyanganaya )

YES Brother in Near to that place 25 KM from my town to Veddhas place come and visit call me +94717619176

[Techtiger]

Re: dell motherboard 13283-1 power problem

YES Brother in Near to that place 25 KM from my town to Veddhas place come and visit call me +94717619176

Good I suppose you have not tested the points that I have highlighted

[469896rammy]

Re: dell motherboard 13283-1 power problem

voltage at pr4404 pin 1 and 2

[TechRepairOutpost]

Re: dell motherboard 13283-1 power problem

I have a similar problem to this, Does anyone know a good thread that teaches how to properly test mosfets? I am relatively new to board repair, I can replace parts fine, just don't know the correct way to test them

[TechRepairOutpost]

Re: dell motherboard 13283-1 power problem

or does anyone know where i can by a PU4402 mosfet? are then interchangeable at all, or is this one limited to only being made at dell?