Re: Dell Latitude e7440 (LA-9591P) diagnostic



Hello Piernov

Thank your reply

I have rechecked again signal on JAPS1 connector.

SIO_SLP_S3, SIO_SLP_S4, SIO_SLP_S5 and SIO_SLP_A always 0V. But when I checked SIO_SLP_S0 voltage at first was 0,13V, than I disconnected ground probe and connected it again the voltage inceased up to 3,13V, than I pressed power button and when power had LED off the voltage become 0,13V again, when I moved ground probe again the voltage increased.

I attached video

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Hello Friends

I need your help in Dell Latitude e7440 (LA-9591P) diagnostic.
The issue is that laptop doesn't start if power button applied, the power LED on but than off after several seconds, no image appeared on the screen, cooling fan doesn't on.

I have checked power distribution on the motherboard:
+PWR_SRC – 13,6V
+5V_ALW – 5,1V
+3,3V_ALW – 3,3V
+3,3V_ALW_PCH – 3,3V
+3,3V_RTC_LDO – 3,3V
+3,3V_SUS – 0V
+1,35V_MEM – 0V
+5V_RUN – 0V
+3,3V_RUN – 0V
+1,05V_RUN – 0V...

Re: New Members - please post your introductions here

Hello,

My name is Alex, I am from Ukraine.
Electronics is my hobby. I hope with your help will improve my skills.

Best regards