acer 5920g

[dellxps15]

Re: acer 5920g

damn, changed U10. now i have 3.3 voltage in on pins: 19,46,76,88,115

and on pins 16,73,94 i have 0 volt...... and pc didnt ever start :|

[dellxps15]

Re: acer 5920g

on pin 85 of u10 on R224 i have 3.6v in and 0 out, so i think that resistor is gone,.

also on sw1 of power button i have no voltage....

[dellxps15]

Re: acer 5920g

i did some other try. on D45, pin 3 has 3.6 volt, pin 1 is 0 volt.

on pl6 i have 3.6 volt. on pq18 and pq17 i have 3.6 volt on pin 1-2-5-6, and 0v on pin 3-4.

is that mean i have to change for second time the sio chip u10 ?

[dellxps15]

Re: acer 5920g

cant edit, so ill add upgrade: put back old windond u10 chip. now on d4 i have 0.3 volt (instead of 3.3 or 0 with the other chip.) all voltage to u10 are present except on pin 85 where i have 0 volt on pin , 3.6 volt before R224 resistor and 0v out r224 resistor. is that the problem then? bad resistor that dont give that voltage and all working bad... ?

why the new one didnt ever give me o.3volt on d45 pin N°1 ?

[dellxps15]

Re: acer 5920g

changed another u10 ,but same as before; changed also R224 and same ; 3.5 volt in and 0 out on that r224..... do i need to respect a side for that 0402 resistor ?

[dellxps15]

Re: acer 5920g

checked that 0402 resistor r224 and it read ok. dunno why it has 3.5 volt one side and 0 the other...

[loser18]

Re: acer 5920g

Are you getting rsmrst from pin75...also couldn't be pin85 shorted with other pins next to?

[drdyzio]

Re: acer 5920g

if i check the most important pl resistor i see the pl16 related to ddr2 1.8volt is shorted both side.

Hey im trying to understand more.

How do you test for this. thanks

[loser18]

Re: acer 5920g

Just ground black probe & test with red in diode (beep) mode...if your reading is less than 10 your component is most likely shorted...you also need to check schematics as some of the components are grounded so you know which side or pin to test...of course with unplugged charger or battery...

[dellxps15]

Re: acer 5920g

Are you getting rsmrst from pin75...also couldn't be pin85 shorted with other pins next to?

on pin 75 have 0 volt efen if i press power botton. pin 85 is not shorted...

[loser18]

Re: acer 5920g

I wanted to check rsmrst after pressing pwr button...
If you don't have the RSMRST signal that means there's a problem with SIO or BIOS...
I'm not a PRO, so not sure sure if all designs work like that...
Think atsio could clarify this, as he knows the stuff...

Also I would check

-pin26 @ U10
-pin2 @ PQ43

Of course after pressing pwr...

[dellxps15]

Re: acer 5920g

flashed bios and same..... im going to replace another sio... as the other one i forgot to remove cmos battery... :|

[dellxps15]

Re: acer 5920g

cant edit, but changed another new sio chip and always the same.

pin 26 u10 = 0 volt

pin2 pq43 = 0 volt.

pin3 of pq43 = 7.5 volt (dunno if multimeter battery is low)

edit: on pr153, i have 13volt in and 0 out.... is that normal for a 1m resistor ?

[loser18]

Re: acer 5920g

Ok...

So you do have 3V on PIN19, 46, 76, 88, 115 @ U10?
If so, are you getting low state signal on pin95 after pressing power button?

Also I don't like that you're getting 7.5V on VIN rail...In most mobos it should be 19V or above...

Check Voltages=

-PQ31 PIN4
-PQ32 PIN3
-PL18

[dellxps15]

Re: acer 5920g

Ok...

So you do have 3V on PIN19, 46, 76, 88, 115 @ U10?
If so, are you getting low state signal on pin95 after pressing power button?

Also I don't like that you're getting 7.5V on VIN rail...In most mobos it should be 19V or above...

Check Voltages=

-PQ31 PIN4
-PQ32 PIN3
-PL18

pin 19,46,76,88,115 of u10 = 3.6 volt


pq31 pin4 =20volt
pq32 pin3 =20 volt
pl18=20 volt

tnx for helping, im getting mad with this laptop :S

[loser18]

Re: acer 5920g

And what about PIN95 @ U10, before and after pressing power button?

[dellxps15]

Re: acer 5920g

0 volt.... always 0volt even if i press power botton

[loser18]

Re: acer 5920g

That's not right...you must have 3V as well as on power button/board...so problem lies there...Does it have separate power button board?

[dellxps15]

Re: acer 5920g

yes, connector is cn4. on that connector of 16 pin, i have 3 volt on pin 1.

pin 14 ha 1.3volt
pin15 has 2volt

edit: on D45, i have on pin 3 (gate) 3volt . 0volt on the other 2 pins

havent schematic of that power board....

[loser18]

Re: acer 5920g

How could you have 0V @ PIN95 & the same time 3V at D45???
Don't understand that...
Could You measure again, pls...Without PWR board...

Also check PIN91 voltage...