acer aspire ES1-432 white screen problem

[String2016]

Hi everyone!I need help on this Acer aspire ES1-432 DA0ZQFMB6F0 REV:F.The problem with this display comes on and after a few second it comes white screen,I already tried replace lvds cable and test screen on other motherboard both are ok but when i plugged in the screen with this motherboard it boots fine shows image,but a couple of seconds it shows white screen.Can anyone help me on this please

[caspian]

Re: acer aspire ES1-432 white screen problem

How is the external display?

[String2016]

Re: acer aspire ES1-432 white screen problem

THanks for the response external display ok

[caspian]

Re: acer aspire ES1-432 white screen problem

This problem seems really strange. So solving it may take a long time. Inspect the board around the LVDS connector for any hot or corroded IC.

[String2016]

Re: acer aspire ES1-432 white screen problem

I inspect around lvds seems fine no corrosion or hot components,ill tried different screen still the same issue display the after a couple of second goes white again

[caspian]

Re: acer aspire ES1-432 white screen problem

if you turn the laptop on after a long time of being off, how many seconds does it take to go white?
if you shut it down after a white screen and turn it on immediately, how many seconds does it take to go white?

[String2016]

Re: acer aspire ES1-432 white screen problem

If laptop shutdown for a long time it takes 48 seconds to goes white the a second ok the goes white again.if shut it down immediately and turn on again i takes 16 seconds to goes white again.

[caspian]

Re: acer aspire ES1-432 white screen problem

when it goes white, how many times does the display switch between being OK and being white? periodically or just once?

[String2016]

Re: acer aspire ES1-432 white screen problem

it switch twice then goes white then not switching again

[caspian]

Re: acer aspire ES1-432 white screen problem

Now keep track of voltages on the LVDS connector to see which pins have voltage change when the display switches from being OK to being white and report the pin number. Take a lot of care not to make any short on the LVDS connector.

[String2016]

Re: acer aspire ES1-432 white screen problem

ok thanks for the response ill give update tomorrow

[caspian]

Re: acer aspire ES1-432 white screen problem

It would help if you take a photo of the board area from the GPU to the LVDS connector.

[String2016]

Re: acer aspire ES1-432 white screen problem

ok thanks caspian ill upload image tomorrow and give update on those pins of lvds

[String2016]

Re: acer aspire ES1-432 white screen problem

still i haven't solved this issue does anyone have a schematic for this model please.attach is the image of the lvds connector can someone help me please

[JaroTech]

Re: acer aspire ES1-432 white screen problem

Hi, what voltage do you have on pin 35 of the LCD connector when the screen is white?

[String2016]

Re: acer aspire ES1-432 white screen problem

thanks for the response on pin 35 0v when white screen

[bluestone]

Re: acer aspire ES1-432 white screen problem

I have solved similar issue before and it was due to the LCD_VCC voltage, look for the transistor supplying that voltage and replace it. Or send the board model so that I can help you out with the schematic

[String2016]

Re: acer aspire ES1-432 white screen problem

Thanks for the response board codeA0ZQFMB6F0 REV:F in the image above i have uploaded there is one transistor before the ceramic caps could it be that one?

[String2016]

Re: acer aspire ES1-432 white screen problem

anyone please help

[JaroTech]

Re: acer aspire ES1-432 white screen problem

Follow pin 35, what is connected to it? Do you have a chip written 523A on it?