Re: Dell Laptop Inspiron 13 5379 shuts down at start up
Thank you for the compliments. Why I didn't bother to measure the impedance to GND is because 3D3V_S0 and 5V_S0 and other measured lines are up and precise for 5 seconds and if there is a short on them they would shut down within 1 or 2 sec.
However VCC_CORE , +VCCGT and +VCCSA measure about 3 Ohms to GND.
My question would be...Why does VCC_SENSE connected to pin 47 from PU4601 (NCP81218) measures 3.5R to GND, while if I compare it with the other 2 sense lines (VCCGT_SENSE and VCCSA_SENSE, which measure about...
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Dell Laptop Inspiron 13 5379 shuts down at start up
Anyone here specialized in Dell Laptop Inspiron 13 5379 ?
I'm working on a laptop that when powered on , shuts down after 5 seconds and repeats this each time it's powered up. You can hear the HD spinning until the lap shuts down. The fan doesn't spin at all. VCC_CORE , +VCCGT , + VCCSA remain 0V and PWM's at pin 4 PU4701, PU4702 , PU4801 (NCP81382) is 2.0V (Mid state) for 5 seconds at power on and drop to 0V and PWM at pin 2 PU5001 (NCP81253) remains 0V. What I noticed is that CPU pin E32 line which is VCC_SENSE connected to pin 47 from PU4601 (NCP81218) measures 3.5R to GND and...
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Re: New Members - please post your introductions here
Hi electronic friends,
You can call me Melvin.
With over 30 years doing electronics for a living I still love it. Can you believe it ?
Still doing researches and updating with semiconductors and equipment in the electronic field on a regular basis.
Have seen this website many times along my researches, so it must be good. Nice to join you guys.
Let's Get Ready To Rumble !!!
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Re: Dell Inspiron 15 5567
Did you ever find the schematic ? I'm having problem with no display. Laptop starts up and the power led goes on with the fan spinning and turns off after a while. PWM1_GT at pin 12 from PU602 is missing while PWM at pin 22 and 30 is present for a while and stop because of "Power Good" failure. Because of this missing PWM1_GT the +VCC_GT is also missing at pin 8 from PU605. Any help would be appreciated.
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