hi everyone,
need some advice i am not professional just junior , but maybe someone could help me please
i have
Device : Laptop
Brand : DELL
Model : LATITUDE 5410
Board Number: FDZ41 LA-J371P Rev:1.0
i am attaching schematics and board view. [MOD EDIT] Link to schematic - https://www.badcaps.net/forum/troubl...14#post3484414
my problem is its not turning on , i follow the video with a similar board of dell 5400 in youtube ,as i said i am not pro, i am getting 19v true the first 2 mosfets which is pq9 and pq4 then i went to check what i am getting on current sense resistor pr700 and i am getting 19v too from there i moved to pq700, pq701 and in here i am start getting not 19v as board view shows but 16.80v
i noticed on pq700 pin 1234 19.89v but pin657 16.80v
and i dont understand , in my understanding its not right,
video advising to measure on a pq701 mosfet in diode mode red prob to the ground and black on pq701 on pin 3/4 and i am getting 0.504v which is good about the same is on pq700.
i measured power on button and instead of 3v i am getting 0.9v
then i used thermal camera to see what is heating up and PU2 was quite hot 38c but when i measured i am getting on pin1 19v and on pin 3 3.3v so its good
and 2 more was heating up pu700 and pu701
i hope that helps what i said , i tried to explain as best as i can to my knowledge.
many thanks
gugutm
need some advice i am not professional just junior , but maybe someone could help me please
i have
Device : Laptop
Brand : DELL
Model : LATITUDE 5410
Board Number: FDZ41 LA-J371P Rev:1.0
i am attaching schematics and board view. [MOD EDIT] Link to schematic - https://www.badcaps.net/forum/troubl...14#post3484414
my problem is its not turning on , i follow the video with a similar board of dell 5400 in youtube ,as i said i am not pro, i am getting 19v true the first 2 mosfets which is pq9 and pq4 then i went to check what i am getting on current sense resistor pr700 and i am getting 19v too from there i moved to pq700, pq701 and in here i am start getting not 19v as board view shows but 16.80v
i noticed on pq700 pin 1234 19.89v but pin657 16.80v
and i dont understand , in my understanding its not right,
video advising to measure on a pq701 mosfet in diode mode red prob to the ground and black on pq701 on pin 3/4 and i am getting 0.504v which is good about the same is on pq700.
i measured power on button and instead of 3v i am getting 0.9v
then i used thermal camera to see what is heating up and PU2 was quite hot 38c but when i measured i am getting on pin1 19v and on pin 3 3.3v so its good
and 2 more was heating up pu700 and pu701
i hope that helps what i said , i tried to explain as best as i can to my knowledge.
many thanks
gugutm