Switch OLED Black Screen with tactile working

[Eds05]

Hello Guys,

Im trying to repair an OLED switch with blackscreen.

- the console is fully functional docked
- I change 2 times the screen connector
- I swap the motherboard to try the screen (is working)
- the tactile is functioning

I made diodes mesurements and everything is ok exept the pin 35 (0.179v), 28 (shorted, it shouldn’t), 7 (1.163v) and 6 (0.157v).

I followed this picture.


The pin 28 is still shorted without the connector.

Do you have an idea ?

 

[jkyoho]

pin28(0.667) comes directly from backside LED drive ic, check if anyone worked on the emmc shield and bridge the test point to ground

 

[Eds05]

Damn Im so upset it was that, but I touch the driver etc… Im good to buy a new one

Thanks ! At least I learned something more, next time I put solder mask on these points before fixing the dat0 adapter on the emmc.

Post automatically merged: Apr 15, 2024

Ok all my measurements are good on the connector now, but the console does not turn on.

No damages on the board, no shortcuts around power management ICs and the driver of the screen.

The board draws :

Screen connected
- with battery: 0,469A
- without battery : 0,033A and if I reverse the usb c connector I have between 0,005 - 0,008A

Without screen
- with battery : 0,469A with both usb-c side
- without battery: 0,006A switching to 0A and
looping but if I reverse the usb c port I have 0,033A

No reactions of the picofly.

My emmc could be faulty ?

 

[jkyoho]

you need to upload some picture of your board since modchip been installed so failed installation may happen

 

[Eds05]

Please do not laugh, since the moment I removed the ic driver to try to remove the shortcut on the pin 28 the vcc wire of the picofly was broken … the issue was the hint you gave me. At least like that I did a permanent dat0 and I reconnected the vcc … ahah ridiculous