acer extensa 5635z DA0ZR6MB6E0 REV:E no start

[poweron]

hello, pressing power on / off turns on both led power and power-on, turns the fan for two seconds, turns hd, but the screen remains black, after 5 sec everything turns off, then after another 5 sec it turns on again, everything as before with black screen, I tried to replace the ram but nothing changes, some advice
I removed the battery but nothing changes, I checked the main voltages and they are all present, I also tried other CPUs but no results

thank

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

First make sure your problem NOT on LVDS cable or LED panel.
Connect your mobo with external monitor and see if there is display.

Use diode mode on multimeter to take the impedence on all the large inductors .After take some voltage mesurments and post all the results here .

http://www.s-manuals.com/motherboard/quanta_zr6

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

ok

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

even connecting an external monitor remains black, I measured the voltages on the main inductors:
PL4-PL6 = 0,97v
PL9 = 1.07v
PL8 = 1,52v
PL12 = 5v
PL13 = 3.3v
I also measured with the diode tester between inductances and earth by inverting the test leads:
PL6-PL4 = 50/29
PL9 = 180/310
PL8 = 180/310
PL12 = 1500/148
PL13 = 1100/148

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

all seems ok . let's take more measurements :

U19 all pins .
DDR3_DRAMRST pin 30 on DDR slot.
RTC_RST : R544 and R566 both sides .
U15 all pins.
LVDS connetor : pin 1/2/3/4/5/11/12.
Lid Switch HE1.
PL10 : voltage and impedance

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

U19:

pin:

1=3,3v
2=3,3v
3=0
4=3,3v
5=3,3v

U15:

pin

1=3,3v
2=3,3v
3=0
4=3,3v
5=3,3v

lvds conn:

pin

1=18v
2=18v
3=0
4=0
5=3,3v
11=0
12=0


lid switch he1:

pin
1=3,3v
2=3,3v
3=0

rtc_rst:

r544 = 3,2v/3,2v
r566 = 3,2v/3,2v

ddr slot pin30:

ddr_dramrst = 0v

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

SO we have some missings volts !

U1 pins 1/3/4/6 voltages
ddr_dramrst must be 1.35v...did you try a good known DDR3 Ram .
you don t answer me about PL10 : voltage and impedance

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

sorry for PL10, I didn't tell you it's not mounted,
these are the tensions on U1
pin 1 = 0
pin 3 = 0
pin 4 = 3.3v
pin 5 = 3.3v
apparently the LCD_VCC is missing

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

perhaps because the LCD_VCC_ON is not present

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

U1 pin 3 test his impedance .
Volt R21/R24 both sides

[SMDFlea]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

SO we have some missings volts !

U1 pins 1/3/4/6 voltages
ddr_dramrst must be 1.35v...did you try a good known DDR3 Ram .
you don t answer me about PL10 : voltage and impedance

The ram is DDR3 1.5V

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

pin 3 to gnd : 470/1080 reversing + and-

r21 not mounted
r24 0v-0v

I noticed that the rtc vcc is not there and by inserting the 3v battery it drops to 0.5v but from + to ground it is not short

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

The enable signal from GMCH is missing : INT_LVDS_DIGON.
Don't forget when you take this voltage from LVDS connector the screen must be connect to the motherboard .

U34 all pins .
L18 and L39

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

INT_LVDS_DIGON = 0V

U34:
pin 1 = 3.2v
pin 2 = 3.3v
pin 4 = 3.3v
pin 5 = 3.3v

L18 = 1.03v
L39 = 3.3v

[lapfix]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

Forget to ask you about this voltages ! :

PQ13 / PQ33 / PQ38 / PQ14 / PQ15

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

Forget to ask you about this voltages ! :

PQ13 / PQ33 / PQ38 / PQ14 / PQ15

ok controllo

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

PQ13:
pin1-2-5-6=5v
pin3=12,8v (in the schematic it's 15v)
pin4=5v

PQ33:
pin123=5v
pin4=12,8v
pin5678=5v

PQ38:
pin123=3,3v
pin4=12,8v
pin5678=3,3v

PQ14:
pin1=3,3v
pin2=12,8v
pin3=3,3v

PQ15:
pin1=3,3v
pin2=12,8v
pin3=3,3v

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

we have taken note that the NB does not generate the DDR3_DRAMRST and INT_LVDS_DIGON signals, I wanted to ask if there may be any factor external to the NB that prevents generating those signals or generates them alone?

[poweron]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

I found a similar but functional card, I measured the two voltages at pin 30 = 1.5v(DDR slot) and on the r24 = 3.3v, I also made the backup of the bios and it is different from the others that I also found on the site, I tried this bios on the other cards but the screen does not turn on, so the problem is on the NB or on something that does not allow to generate the two signals

[mcplslg123]

Re: acer extensa 5635z DA0ZR6MB6E0 REV:E no start

What is the resistance and voltage on PIN 1 of DDR Ram Slot??