Technical Support No Display Dell LA-5472P REV 1.0(A00)

[Dulur]

HELLO
I have a problem with a Dell LA-5472P REV 1.0(A00) no Display laptop, flash the bios but it still doesn't work, then take a voltage measurement on the coil:
PL12 PL12 PL13 = 0.77V
PL7 = 0.42V
PL18 = 1.05V
PL901 = 1.01V.
please all my friends' opinions, what causes the pl7 voltage to weaken, because if the voltage scheme must be 1.01V, I need a way to check it, please provide a solution. Thank you.

 

[user43635]

Maybe you should check U16 VCC pin. Maybe the voltage drops

 

[Dulur]

Maybe you should check U16 VCC pin. Maybe the voltage drops

Thanks for the response
GOOD is present 5v, FOOD is not present, is the pu16 ic possibly damaged?
Thanks for the response

 

[Dulur]

What do you think, Mr. Hosein or Mr. Ahmad Safari, please wait

 

[Ahmad Safari]

HELLO
I have a problem with a Dell LA-5472P REV 1.0(A00) no Display laptop, flash the bios but it still doesn't work, then take a voltage measurement on the coil:
PL12 PL12 PL13 = 0.77V
PL7 = 0.42V
PL18 = 1.05V
PL901 = 1.01V.
please all my friends' opinions, what causes the pl7 voltage to weaken, because if the voltage scheme must be 1.01V, I need a way to check it, please provide a solution. Thank you.

(pl7 )It has a problem.
This voltage enters different parts. One of these parts is damaged and causes a voltage drop that you have to go through the schematic and find the defective part.

 

[Dulur]

(pl7 )It has a problem.
This voltage enters different parts. One of these parts is damaged and causes a voltage drop that you have to go through the schematic and find the defective part.

ok
Thanks