Hello, any help will be apprecited!
I have checked so far:
-Voltage Coils
Measured all coils in diode mode and all off them seem ok (per reference from several other boards).
-Voltages S4/S5 (Schematics P3).
Power Sequence: (Schematics P5)
I am suspecting this is a MEC1515-NB issue, but please let me know what you think. Any advice on will be appreaciated!
(I know those MEC1515 are a pain...)
Gracias!!
- Model: Dell G15 5511
- MB: LA-K452P
- Issue: Won't turn on at all, no leds, no keyboard light, no fan spin, nothing happens when pressing power button. NOTHING.
- Customer reported it was turned off and left plugged in during the night and thats it...
- No signs of liquid damage or burned components.
I have checked so far:
-Voltage Coils
Measured all coils in diode mode and all off them seem ok (per reference from several other boards).
-Voltages S4/S5 (Schematics P3).
- +RTC_CELL: 3V
- +5VALW: 5V
- +3VALW: 3.3V
- +3VALW_PCH: 3.3V
- +3VALW_DSW: 3.3V
- +1.8V_PRIM: 1.79V
- +1.05VO_OUT_FET: 1.04V
Power Sequence: (Schematics P5)
- +3VL_RTC: Present
- PCH_RTCRST#: Present
- +19VB: Present
- +3VLP/5VLP: Present
- EC_ON: NOT found. No present on MEC or with a different name?
- +5VALW/+3VALW/+3VALw_DSW: All present
- PM_BATLOW#: Present
- +1.8VALW: Present
- +1.05VALW: Present
- +1.05V_PCH_PRIM: Present
- +SUSACK#: Present
- +On/OFF: Working ok (tested on button and on MEC).
- +PBTN_OUT#: NOT PRESENT (Neve appeards, checked with oscilloscope)
- AC_Present: Present
- 32K Oscillator: Working
- 38M Oscillator: Not on (If I am not wrong this turns on when power on).
- Tried 2 Bios and same (I do see data transfer when pluggin the charger).
- Tested with 2 know good 240W adapter.
I am suspecting this is a MEC1515-NB issue, but please let me know what you think. Any advice on will be appreaciated!
(I know those MEC1515 are a pain...)
Gracias!!
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