Lenovo G710 płyta Dumbo2 grzeją się cewki

Witam,
jak w temacie mam płytę Dumbo 2 rev 2.1 plyta po uszkodzeniu min KBC,
po wymianie układu płyta pobiera 0.18A i grzeją się cewki w okolicy procesora ,
załączam zdjęcie z opisem.
Będę wdzięczny za pomoc w ożywieniu płyty.

Hello!

- Does the board respond to pressing the power button?
- Do the coils also heat up with the CPU removed from the board?

adikomp написав:płyta pobiera 0.18A

- Is this power consumption measured when the machine is turned on?

Thanks for your answer matic.
Board is without CPU and then coil heat up, and no reaction on PW BTTN,
power consumption is in power connected only, machine turned off.

Anybody have any ideas maybe ?
Czy ktoś mądrzejszy ode mnie ma może jakieś pomysły ?

Measure the resistances and voltages to ground on all coils.

ok
because coil have no description i attach picture with measurements.
Black-resistance,
Yellow - voltage on ST_BY,
Green - when power on,
Blue - when power on and cpu and memory attach.

Measure the voltages to ground on pins 16, 17, 20 of marked chip when the machine is turned off (st-by).

Voltage on pins in st_by:
pin 16 (s5) - 0v
pin 17 (s3) - 0v
pin 20 (pgood) - 0v

Voltage on pins when pw bttn on and CPU and memory out of board:
pin 16 (s5) - 3v2
pin 17 (s3) - 3v2
pin 20 (pgood) - 3v3
and coils are heating up

adikomp написав:Yellow - voltage on ST_BY

Are you sure there is 1.35V on the marked coil, when the machine is turned off (st-by)?

HI,
it is nor yellow its (Green - when power on),
and yes is there 1.35 when laptop switch on.

adikomp написав:it is nor yellow its (Green - when power on),

Okay, that changes everything.

adikomp написав:grzeją się cewki w okolicy procesora

How warm are these coils are? Can you keep your finger on them?

The coils it warm for around forty degrees i fill it under fingers,
and i will afraid about CPU because 1v7 can be destroy it or overheating.

Measure the voltages to ground on pins 1, 2, 3, 16, 17, 18, 27, 31, 32 of marked chip.

Mesurment on pins when laptop on and cpu on board:
pin 1- 1v
pin 2 - 3v2
pin 3 - 3v3
pin 16 - 5v1
pin 17 - 19v
pin 18 - 6v7
pin 27 - 6v7
pin 31 - 1v
pin 32 - 1v
coils have around 44 degrees

adikomp написав:Board is without CPU and then coil heat up, and no reaction on PW BTTN,

adikomp написав:Yellow - voltage on ST_BY,
Green - when power on,

How do you turn on/off the board, if it does not react to the power button?

adikomp написав:Board is without CPU and then coil heat up, and no reaction on PW BTTN,

here i answer on you preview question is a reaction on pw bttn without cpu

adikomp написав:Yellow - voltage on ST_BY,
Green - when power on,

How do you turn on/off the board, if it does not react to the power button?

is answer on layer answer but in the meantime i try to other way to fix and change bios and situation was changed before i post,

maybe i will writing a current situation is that, still coils warming up without CPU (40C)and more with CPU (50C) and on CPU cap i have 1v7 , i maked short test laptop on i3-4300 but am afraid try it longer, because overvoltage can kill the CPU

What is the power consumption (in mA) of the board, when the machine is turned off (St-by) with the CPU connected?

Hi, matic,
power consumption on st_by is 0.003A (3mA)
kind regards

Measure the power consumption (in mA) of the board, when the machine is turned on with the CPU connected. Measure it in two cases - with and without RAM memory connected.

Hi matic,
measurements are
with CPU and RAM 1250mA,
without RAM 682 mA and after few second rebooting,
kind regards.