Hi all
I have a Asus X550LD laptop (cpu intel i5 4200u, gpu nvidia 820M) here that refuses to turn on.
No visible physical or water damage on the board.
CMOS reset; coin battery is fine; plug is fine (gets 19,5v up until a certain point and 3,3v to the battery charging plug); power button discharge done; still nothing.
The interesting things that I've noticed:
-when power button is pressed, all the front LEDs flash once, in sequence and then only the far left one stays on for a second, then turns off as well.
-i hear a pulsating (cca. once a second) high frequency "whine". when measured on a certain point (forgot which one exactly), the voltage jumps up and down.
I have the boardview schematic and guide, but don't know how to use them ^^
Thanks for the help
I have a Asus X550LD laptop (cpu intel i5 4200u, gpu nvidia 820M) here that refuses to turn on.
No visible physical or water damage on the board.
CMOS reset; coin battery is fine; plug is fine (gets 19,5v up until a certain point and 3,3v to the battery charging plug); power button discharge done; still nothing.
The interesting things that I've noticed:
-when power button is pressed, all the front LEDs flash once, in sequence and then only the far left one stays on for a second, then turns off as well.
-i hear a pulsating (cca. once a second) high frequency "whine". when measured on a certain point (forgot which one exactly), the voltage jumps up and down.
I have the boardview schematic and guide, but don't know how to use them ^^
Thanks for the help
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