Lenovo Thinkpad T440S - nie uruchamia się

Płyta główna: Vilto NM-A052 Rev: 1.0
Cześć
Mam problem z laptopem jak w temacie. Laptop po podpięciu zasilania pobiera 2mA prądu, nie reaguje na klawisz zasilania. Na klawiszu zasilania 3V, spada do 0 po wciśnięciu.
Po podpięciu zasilania 20V kończy się na Q9
Q9 i Q36 na teście diody ma prawidłowe pomiary.
Bios z czystym Me regionem wgrałem nowy - bez zmian
Proszę o pomoc w naprawie sprzętu.
Q9
n.1 - 20V
n.4 - 19.6
n.8 - 0V

Q107
n.1 - 19.6
n.2 - 20
n.3 - 20

Q61
n.1 - 20
n.2 - 0
n.3 - 0

Q78
n.1 - 19
n.2 - 0
n.3 - 0

Q51
n.1 - 19.5
n.2 - 19
n.3 - 18,8

Q79
n.1 - 18.8
n.2 - 0
n.3 - 0

R380 - OL

Is the RTC battery charged?
If it is discharged, change it and measure if you have voltage on pin 8 of Q9.

Bateria RTC jest ok. 3.2V, niestety brak napięcia na n.8 Q9

Hello!

Measure the voltages to ground on pins 59, 64, 65, 66, 68, 99, 100, 102, 103 of ThinkEngine chip U101.

U101 (V)
n. 59 - 19.2
n. 64 - 0
n. 65 - 0.8
n. 66 - 0.4
n .68 - 0.2
n. 99 - 19.5
n. 100 - 7.3
n. 102 - 19.2
n. 103 - 3.3

Measure the resistances to ground on pins 65, 66, 68 of chip U101.

U101
n. 65 - OL
n. 66 - OL
n. 68 - 13MΩ

Measure the following voltages to ground:
- On pin 1 of capacitors C285, C459.
- On pins 2, 4, 14, 15, 36 of charger chip U1.
- On pins 26, 27, 30, 96, 97 of ThinkEngine chip U101.
- On both pins of quartz Y6 with an oscilloscope. If you don't have it, measure with a multimeter.

C285 - 3.2V
PU1 (V)
n. 2 - 0
n. 4 - 2.5
n. 14 - 6
n. 15 - 6
n. 36 - 20

u101 (V)
n. 26 - 3.2
n. 27 - 3.2
n. 30 - 0
n. 96 - 0
n. 97 - 3.3

Y6
n. 1 - 32.7kHz
n. 2 - 32.7kHz

Measure the resistance to ground on pin 96 of chip U101.
If the resistance is high (in the kΩ range or greater), check the resistor R1101 (33kΩ) and check if there is 3V on pin 2 of this resistor.

U101
n. 96 - 173kΩ

R1101
n.2 -3.3V
Rezystor ma 33kΩ

Solder a jump wire between the fuse F2 and pin 1 of resistor R380. Set the laboratory power supply to 20V and current limit to 0,2A and connect it to the DC socket. The main battery must be disconnected from the board.
What electrical current flows from the laboratory power supply in this case? Does the machine respond to pressing on the power button?

Płyta pobiera 0mA, nie reaguje na klawisz zasilania.
Tylko na cewce PL5 mam 1.7V

Measure the voltages to ground on pins 4, 12, 13, 21, 22, 23, 26, 29, 31 of chip U41 with a soldered jumper wire.

U41 (V)
n. 4 - 0 (11MΩ)
n. 12 - 0 (186kΩ)
n. 13 - 0 (390kΩ)
n. 21 - 0 (11,4MΩ)
n. 22 - 3.3
n. 23 - 20
n. 26 - 0 (30MΩ)
n. 29 - 0 (185kΩ)
n. 31 - 0 (OL)

Try to replace the ThinkEngine chip U101.

Układ ThinkEngine trudno dostępny w Polsce, więc wymieniłem płytę. Dzięki za pomoc