Sony VAIO PCG-71211M - MBX 224 Całkowicie Martwy

Model: VPCB1S1E PCG-71211M
Platforma: M960 MBX-224
PCH BD82PM55
KBC NUVOTON NPCE783LA0DX
VGA ATI 216-0772000

Laptop całkowicie martwy. Po podłączeniu zasilacza dioda na zasilaczu nie gaśnie.
Po wciśnięciu przycisku POWER żadnej reakcji, żadne diody nie świecą.
Na wszystkich cewkach 0V
Rezystancje:
PL2 - 2MΩ
PL6 - 16kΩ
PL16 - 16kΩ
PL17 - 16kΩ
PL5 - 2MΩ
PL8 - 2MΩ
PL7 - 4,7Ω
PL18 - 30Ω

Hello!

Measure the voltages to ground on pins 1, 3, 4, 5, 6, 7, 12, 13, 14, 17, 19, 24, 27, 31 of chip PU19.

PU19
1 2V
3 5V
4 3.3V
5 3.3V
6 19.7V
7 5V
12 0V
13 0V
14 0V
17 4.8V
19 0V
24 4.8V
27 0V
31 0V

PitD написав:19 0V

Is this measurement correct?

I check again.
19 is 5.04V
Sorry my mistake.

Measure the voltage to ground on pin 5 of chip PU9.

Voltage to ground on pin 5 of chip PU9 is 3.3V

Measure the voltages to ground on pins 15, 23, 44, 64, 77, 79, 85, 93, 95, 99, 101, 119, 124 of KBC chip.

Measure the voltages to ground on pins 26, 94 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed.

matic написав:Measure the voltages to ground on pins 15, 23, 44, 64, 77, 79, 85, 93, 95, 99, 101, 119, 124 of KBC chip.

Measure the voltages to ground on pins 26, 94 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed.

15 0V
23 0V
44 1,8V
64 0V
77 1.2V
79 0.4V
85 3.3V
93 0V
95 0V
99 3.3V
101 3.3V
119 0V
125 0V

26 0V/0V
94 3.3V/3.3V

Check the power button, the closing contact is missing.

Flex cable was broken.
After replace.
26 0V/0V
94 3.3V/0V

Reflash both MAIN + EC (U98 + U23) BIOS chips. Don't forget to save the old dumps.

Measure the voltages on the KBC as per post 8.

After reflash

15 0V
23 0V
44 1,8V
64 0V
77 0.5V
79 0.4V
85 3.3V
93 0V
95 0V
99 3.3V
101 3.3V
119 0V
125 0V

26 0V/0V
94 3.3V/0V

Replace the bios and remember to save the old one.
If it does not resolve with the new bios replace the KBC.

Bios replaced.
KBC replaced.
No work
Returned to the owner.