Damaged CMD (A) pad on OLED after botched picofly install - salvageable?

[psilos15]

Hey there folks,

first time trying to install an AliExpress Picofly modchip with the big black flex cable, everything went to hell and decided to remove it.
Unfortunately I also removed the CMD resistor with it. Bought new ones on Digikey, but I can't for the life of me solder anything to that second pad, nothing is sticking.

Is the switch dead? Or is there still hope?

Cheers
Nick

 

[BigOnYa]

You most likely broke the pads off the motherboard that hold the component. You can try following the trace lines and scrape away the silkscreen paint to try get down to copper till holds solder, but it may be a tough fix. You may be able to find a electronics repair place that will do "trace" fixes. Sorry to hear, and good luck.

 

[linuxares]

Is this the black cable or the Switch itself?

 

[psilos15]

Is this the black cable or the Switch itself?

No cables! Just the PCB under suboptimal lighting, I can’t to seem to get nicer pictures with my scope.
The north hole gets solder attached to it easily, but on the south one nothing sticks and looks brown/black. So either oxidised or the copper pad came out with the cap itself. But I can’t clean it with anything, so I’m leaning more to the latter..

 

[BigOnYa]

 

[HawaiianInTown]

Maybe probe it with multimeter, being hopeful...

 

[linuxares]

I look at board scans of it, and it doesn't look good. Because the bottom ripped pad seem to go to the other side of the board.

 

[BigOnYa]

I look at board scans of it, and it doesn't look good. Because the bottom ripped pad seem to go to the other side of the board.

I was scared of that. Sorry to hear. Well forget my posts above then. Thanks for looking that up!

 

[linuxares]

https://balika011.hu/switch/oled/ - if you want to check out the scans yourself

 

[psilos15]

Yeah that’s what I was afraid, because the top one is the ground pad. So the multimeter still gives a value on the perimeter! It’s the normal 0,65 in diode mode as before the install, but only on the perimeter. In the center of the hole nothing, it’s prob burnt. Is there any way to reconstruct the pad? Can you even solder copper there?

 

[linuxares]

Yeah that’s what I was afraid, because the top one is the ground pad. So the multimeter still gives a value on the perimeter! It’s the normal 0,65 in diode mode as before the install, but only on the perimeter. In the center of the hole nothing, it’s prob burnt. Is there any way to reconstruct the pad? Can you even solder copper there?

If you're luck you might find copper there and you can buy a replacement pad.
Like these https://www.aliexpress.us/item/3256802297090384.html?gatewayAdapt=glo2usa4itemAdapt


Hell some use solder braids as replacement pads

 

[cilione]

Yeah that’s what I was afraid, because the top one is the ground pad. So the multimeter still gives a value on the perimeter! It’s the normal 0,65 in diode mode as before the install, but only on the perimeter. In the center of the hole nothing, it’s prob burnt. Is there any way to reconstruct the pad? Can you even solder copper there?

That pad goes straight to the APU.
Repairable if you can grind and solder to the trace.
The trace is on the third layer.

(Correct me if I'm wrong.)