Acer V17 Nitro no image

[mik001]

Hello,
I have a acer V17 nitro mb Poseidon 14203-1m that starts but have no image.The voltage on cpu is 1.77v , on gpu is 0.90v. ALL_SYS_PWRGD_R, DGPU_PWROK is present. The current drawn from power supply cycles between 1.4 and 2 amps.

[mcplslg123]

Re: Acer V17 Nitro no image

Current drawn is almost good. Have you flashed bios??

[mik001]

Re: Acer V17 Nitro no image

I didn't flash the bios because i don't have a spi programmer.The voltage on bios ic pin are: pin 1 3.3 pin2 3.3 pin3 3.3 pin4 0 pin5 cycles betwen 0 and 0.6v pin6 cycles betwen 0 and 0.6 pin7 3.3 pin8 3.3.After a while the voltage on pin 1,2,3 start to cycle betwen 2 and 3.3v

[Kiop]

Re: Acer V17 Nitro no image

Does you keyboard light up ? If you plug or unplug the power ac do you heard a bip , does the hard drive is spinning ?

[mik001]

Re: Acer V17 Nitro no image

Yes the keyboard lights up , the hdd spins . the battery is charging. All voltages seems to be present.

[Techtiger]

Re: Acer V17 Nitro no image

test on the RAM slot pin 199 75 30 203 1 126 200 202

[mik001]

Re: Acer V17 Nitro no image

The voltage with ram in slots are :
pin1 0.69
pin203 3.3v
pin202 3.3v
pin200 0v
pin199 0.74v
pin30 0.74v
pin75 0.73v
pin126 0 v

[mik001]

Re: Acer V17 Nitro no image

I think that the pins on the connector are in odd number so the voltages are.
pin1 0.67
pin203 0.69
pin202 3.38
pin200 3.38
pin199 3.38
pin 75 3.38
pin 30 3.3
pin126 0.69

[Techtiger]

Re: Acer V17 Nitro no image

Now check pin 7 of U2401 SIO PLT RST# pin 85 EC RST# pin67
Double check again pin 75 of RAM slot should be 1.35V

[mik001]

Re: Acer V17 Nitro no image

yes the voltage on pin 75 of ram is 1.38v
The voltage on pin7 of u2401 si 3.3v on pin 67 3.3v and 85 3.3v

[Techtiger]

Re: Acer V17 Nitro no image

All Voltage seems to be correct only Bios to be flash back up Old DUMP , did you test with HDMI ? Check LVDS pin 31 19 28 29

[Kiop]

Re: Acer V17 Nitro no image

Hello , i have the same issue the a acer V17 , laptop is powering up , backlight of keyboard lit up , i can disable the backlight , using FN + F4 , also , if i plug and unplug the power adpater i heard a bip . Hard drive is spinning .

So the bios seems to work a bit .

I tried to recover the bios with the bios recovery procedure with FN + ESC ...

No luck .

[Techtiger]

Re: Acer V17 Nitro no image

Hello , i have the same issue the a acer V17 , laptop is powering up , backlight of keyboard lit up , i can disable the backlight , using FN + F4 , also , if i plug and unplug the power adpater i heard a bip . Hard drive is spinning .

So the bios seems to work a bit .

I tried to recover the bios with the bios recovery procedure with FN + ESC ...

No luck .

Check out Post 6# & 9# do you have all the Voltage's?

[Kiop]

Re: Acer V17 Nitro no image

I will check that in a few days , i have to fix some others laptop , but it could be also the nvidia gtx 960 also , wich is faulty ?

[mik001]

Re: Acer V17 Nitro no image

On the lvds connector vbat is present 3.3v is present ,only eDP_BLEN_CON and eDP_BLCTRL_CON are 0v

[mik001]

Re: Acer V17 Nitro no image

I found that 1D05V_VGA_S0 is not present.DGPU_PWROK_R is 0. The signal DGPU_PWROK seems to come from pch.Can the pch be defective?

[peste]

Re: Acer V17 Nitro no image

19V on the lvds connector ,pin 31?

[Techtiger]

Re: Acer V17 Nitro no image

I found that 1D05V_VGA_S0 is not present.DGPU_PWROK_R is 0. The signal DGPU_PWROK seems to come from pch.Can the pch be defective?

Test pin 91 of SIO DGPU_PWROK , R8314 both sides D8301 pin 1

[mik001]

Re: Acer V17 Nitro no image

SIO DGPU_PWROK seems to be shorten internally in the ec . the resistance is 1 ohm. R8314 and D8301 are not present on the board. If i replace the NPCE285PA0DX does it need to be reprogrammed or it will reprogram from the bios?