DELL Latitude E6540 błąd procesora

Witam,
Próbuję naprawić DELL Latitude E6540 płyta VALA1 LA-9412P, specjalnie kupiłem uszkodzony aby się podszkolić.
Po próbie uruchomienia wentylator na chwile startuje po czym pojawia się błąd. Storage LED miga, Power LED świeci Wireless LED świeci co sugeruje błąd procesora.

Jako że to stary laptop i posiada jeszcze socket to wymieniłem procesor niestety ten sam efekt. Wymieniłem również kości biosu tzn. W25Q64 oraz W25Q32 i wgrałem nowy wsad, niestety to również niewiele zmieniło.

Czy ktoś się spotkał z takim problemem lub może mi pomóc gdzie szukać problemu?

Poniżej podaje wyniki pomiarów na cewkach.

rezystancje na cewkach:
PL700 - 23,4MΩ
PL503 - 35Ω
PL502 - 35Ω
PL101 - 10kΩ
PL102 - 24kΩ
PL301 - 1,2kΩ
PL701 - 25MΩ
PL103 - 2MΩ
PL401 - 8,8kΩ
PL201 - 200Ω
NAPIĘCIA:
PL700 - 13,5V
PL503 - 1,745V
PL502 - 1,745V
PL101 - 3,3V
PL102 - 5V
PL301 - 1,07V
PL701 - 19,8V
PL103 - 13,5V
PL401 - 1,5V
PL201 - 1,358V

Hello!

- Try to run the board with the RAM memory disconnected. Are there any changes in operation in this case?
- Measure the power consumption (in mA) of the board, when the machine is turned on with and without RAM memory connected (battery must be disconnected).

Hello,

I performed several current consumption measurements with different RAM configurations: without RAM, with one RAM stick, and with two RAM sticks.
To extend the boot process and better observe the power draw, I flashed a BIOS without the ME region.

The system behavior did not change regardless of the RAM configuration. After pressing the power button, the fan briefly spins up for about 2 seconds, then the laptop shuts down. After that, the LEDs indicate an error: the Storage LED starts flashing, while the Power LED and Wireless LED remain on, which suggests a CPU-related error.

In all cases, when the power adapter is connected and the laptop is off, the current consumption is approximately 10 mA.

There are only minor differences in current draw before the fan starts, depending on the RAM configuration:

Without RAM:
– Current before fan start: ~588 mA
– Current briefly rises to ~620 mA, then the laptop shuts down

With 1 RAM stick:
– Current before fan start: ~592 mA
– Current briefly rises to ~620 mA, then the laptop shuts down

With 2 RAM sticks:
– Current before fan start: ~599 mA
– Current briefly rises to ~620 mA, then the laptop shuts down

Replace the PCH chip.