A1707 820-01326-05 No Display

[kashitozu]

Hello,

I have a macbook a1707 that had a broken screen,
I replaced it and noticed that I had to wait 10-15 seconds for it to display, it came back 6 months later and it no longer displayed.

I've tested with 5 different screens from A1707/A1990 but nothing changes. When I change the screen I get a low battery logo on the display and then it starts up but nothing happens to the display and I have the shift that works I hear it start up.

 

[2informaticos]

01326 is A1990, not A1707.
So, what machine/board do you really have on the desk?

 

[kashitozu]

Yeah sorry is 820-00928-A

 

[2informaticos]

Do you get external video?
Try w/ and w/o internal LCD connected.

BTW, use 87/96W charger...

 

[kashitozu]

I've tried it externally, I get the low battery logo but then nothing.

Same thing with the screen panel plugged in and unplugged.

so it's the same as with the internal screen.

I've tried a 96w charger but nothing changes.
( i have power supply it takes 10A and when i plug the MacBook is take 4A and after is go 1A it meaans the battery is charged )

 

[2informaticos]

Let it charge then.
And try later to turn it on.

 

[kashitozu]

same thing

 

[2informaticos]

So you get low battery symbol anytime you connect the charger?
In such case, the battery isn't charging.

 

[kashitozu]

But the problem doesn't come from the battery, I've already done all the cross tests that were possible and I know that my chassis is good because I've also tried on my chassis with another functional motherboard. So if you have a solution because the problem comes from the motherboard.

 

[2informaticos]

Did you try with 87W, or 96W charger for sure?
This board doesn't turn on with 61W charger and empty battery.
Just in case, test SMC bypass mode.

 

[kashitozu]

I had another A1707 with no problems (we'll call it N ), I did some cross-testing
My motherboard works on the new chassis (I have display )
N's motherboard works in the other chassis, but it took a while to display.
My motherboard has no problem, I just need an original A1707 screen.
For me, the problem comes from the screen because it's an A1990/A1707.
Do you think there's a solution with updates for the screen that fits on the motherboard?

 

[2informaticos]

I recommend to get correct screen assembly, to avoid any complication.