No display ACER DAZ8ADMB6D0 REV D

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

KBC pin 11 check with button pressed
Check pu9 pin 14 button pressed

It should not be zero if zero means 3v is not reaching to KBC

Check capacitor c65 both sides and resistor r814

pin 11 0v pressed 3.3v then 0v again
pin 14 0v presed 1.8v then 0v again

no voltages sir on c65 both sides and also r814 sir

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

C65 can not be zero

Check c65 without any power in beep mode for short

After that if c65 beeps replace it

Then with power check with button pressed resistor r814 voltage

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

C65 can not be zero

Check c65 without any power in beep mode for short

After that if c65 beeps replace it

Then with power check with button pressed resistor r814 voltage

c65 no beep no shorted

r814 voltage 0V pressed goes 3.3v then zero

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Check pu9 17 and 18 pins before pressing and after pressing


Pu9 pin---17 is 3vpcu always present check stable or not
Pu9 pin ----18 is 3vs5 check stable or not

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Check pu9 17 and 18 pins before pressing and after pressing


Pu9 pin---17 is 3vpcu always present check stable or not
Pu9 pin ----18 is 3vs5 check stable or not

pu9 pin 17 has 3.3v stable if pressing power 3.3v dont change
pu9 pin 18 has 0v if pressed 3.3v then goes 0v again

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Check pin---11, 26,24,13 power stable

Measure voltage for 10 sec at each pin

You have found the problem, 3vs5 supply is dropping which is going every where in motherboard

Pin11--vcc
Pin13-- rsmrst

Pin 26--en1.5a --s5_on signal

Pin24---suspwrdnack

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Check pin---11, 26,24,13 power stable

Measure voltage for 10 sec at each pin

You have found the problem, 3vs5 supply is dropping which is going every where in motherboard

Pin11--vcc
Pin13-- rsmrst

Pin 26--en1.5a --s5_on signal

Pin24---suspwrdnack

PIN 11 HAS 5V
PIN 13 notice some problem here sir based on image



I got 3.3v stable but in ic pin 13 nothing

pin 26 0v
pin 24 has 0v sir

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Vcc 5v is stable?

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Vcc 5v is stable?

yes stable sir

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Check check pin 77 of kbc s5_on stable

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Check check pin 77 of kbc s5_on stable

0v sir in pin 77 kbc

when button press nothing happens

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

So s5_on is missing

Check at pin 26 of pu9, before pressing and after pressing button

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

So s5_on is missing

Check at pin 26 of pu9, before pressing and after pressing button

BEFORE 0V
after press 2.2v then goes zero

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

3.3 should be here

2.2 is very low

Remove pu9

and with DC supply at c65 capacitor Provide 3v and check at c65 voltage drop at multimeter

If drops something other is faulty

If stable pu9 is faulty , change

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

3.3 should be here

2.2 is very low

Remove pu9

and with DC supply at c65 capacitor Provide 3v and check at c65 voltage drop at multimeter

If drops something other is faulty

If stable pu9 is faulty , change

pu9 remove

c65 pump with 3v voltage is stable at dc supply 15 miiliamp consuming

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Earlier supply was dropping?

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Earlier supply was dropping?

yes dc supply 38 to 15 miiliamp then keeps flactuating at 15 to 20 milliamp range

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Ok change pu9

[kalilinux25]

Re: No display ACER DAZ8ADMB6D0 REV D

Ok change pu9

ok sir I need to order it and it will arrive 1 moth

[stingerchamp]

Re: No display ACER DAZ8ADMB6D0 REV D

Ok before you do that

Let's confirm it again by different method

With DC supply this time check at pc16 voltage stable or drops, same previous method voltage 3.3v