ACER D270 cannot power on

[Romy2018]

I have acer one d270 , the problem is cannot power on, all voltages present, there is 3.3v on power button , on grey coil near to pu3 ther 3.3v and 5v and also bios chip pins have 3.3v.already tried flashing the bios still the same issue pressing power button nothing happens, anyone please help on this please

[Techtiger]

Re: ACER D270 cannot power on

Check pin 74,75&31 of U10 SIO IC

[ktmmotocross]

Re: ACER D270 cannot power on

search forum

MANY THREADS

[Romy2018]

Re: ACER D270 cannot power on

@techtiger pin 10,74,75 have all 0v

[Techtiger]

Re: ACER D270 cannot power on

now check U10
pin 19 VCC1 3.3V
pin 102 AVCC 3.3V
PIN 31 RTCRST 3.3 V
PIN 26 S5_ON

PU3
Pin 23 SYS_HWPG 3.3V

[Romy2018]

Re: ACER D270 cannot power on

U10 pin 19 VCC1=3.3V
PIN 102=3.3V
pin 31 =0v
pin 26=0v

PU3
PIN23=3.3V


and now i check again on power button switch 3.3v is missing

[Techtiger]

Re: ACER D270 cannot power on

u10 pin 19 vcc1=3.3v
pin 102=3.3v

ok that's good and the rest

[Techtiger]

Re: ACER D270 cannot power on

go to page 13 Schematc
and test D16 both side D15 both side 3.3V
R513 both side 3.3V
this supply goes to SIO pin 31 it must reach their if not set Dead

[Romy2018]

Re: ACER D270 cannot power on

thanks techtiger but i cannot find where D16 AND D15 and R513 located on the board

[Techtiger]

Re: ACER D270 cannot power on

thanks techtiger but i cannot find where D16 AND D15 and R513 located on the board

It should be near the RTC Battrey RN5 RTC socket

[Romy2018]

Re: ACER D270 cannot power on

thanks techtiger, I found the D15= one side have 3.3v the other side 0v. the D16 both side have 3.3v. but the R513 i cannot find it on the board

[Techtiger]

Re: ACER D270 cannot power on

thanks techtiger, I found the D15= one side have 3.3v the other side 0v. the D16 both side have 3.3v. but the R513 i cannot find it on the board

test page 13 schematic can Measuring clock and oscillator frequency 32.768Khz ?

[Techtiger]

Re: ACER D270 cannot power on

go to page 13 Schematc
and test D16 both side D15 both side 3.3V
R513 both side 3.3V
this supply goes to SIO pin 31 it must reach their if not set Dead

Measure ohms pin 31 Sio & D15 both side

[Romy2018]

Re: ACER D270 cannot power on

on pin 31 of sio red probe to ground and black to pin 31 =0.752 and on D15 red probe to ground and black to pins on the side with 3.3v measure 0.457 and on the no voltage side measured 2.10ohms

[Techtiger]

Re: ACER D270 cannot power on

remove the D15 and test out of the Mob did you Measuring clock and oscillator frequency 32.768Khz ?

[Romy2018]

Re: ACER D270 cannot power on

I removed D15 and check the side the same issue on other side has 3.3v and other side has 0.5v. i dont have oscilloscope

[Romy2018]

Re: ACER D270 cannot power on

any help on this please

[Techtiger]

Re: ACER D270 cannot power on

Romy you should buy a multimeter with frequency counter you have to get cleared VCCRTC TO RTCRST#

[ktmmotocross]

Re: ACER D270 cannot power on

just throw it to bin. it is not worth so much time

[Romy2018]

Re: ACER D270 cannot power on

thank you techtiger customer in a hurry i give back the notebook to the customer without solving the problem.