3v3 short while readjusting emmc dat0 connector

[Fede12]

Hi everyone, has the title said i got a problem with 3v3 line, its shorte to ground.
One the 3v3 pin that is used on the v6s flex the ohm resistance to the usb port is 12ohm.
I installed recently the picofly and flashed it to the last firmware, but today it gave me the emmc error, i tried to resolder the dat0 connector and everything felt fine with diode value and everything but i still couldnt get the emmc to get recognised by the chip, would boot directly into OFW, so after 2 times of resoldering the connecto upon turning on the console seems dead, i go check and the 3v3 line was shorted to the gnd also with every flex removed.
im posting here hoping to get some advise, thank you

 

[thesjaakspoiler]

Since things are so small, it can be a unintended solder blob somewhere.
You might have created a bridge on one of the components somewhere when removing the flex cables.
Or if one applies too much heat to a component like a capacitor, it might break and create a short as well.

A thermal cam will show near-shorts in capacitors (they get hot) but I don't know if that also helps finding a full short.
IPA alcohol can also sometimes help to see if anything gets hot because it evaporates quicker on hot components.
But a visual inspection of the areas where you worked is a good start.
Checking capacitors values won't help much as you already have a short.
You would have to remove them, check them and put them back.
Hunting down a bridged capacitor in a PS5 controller took me 2 weeks before finding it.
Just try looking at areas you worked on from different angles.

This site has some good information on all the power rails and what values to expect where.
It is for an original Switch though but the components are the same.
https://www.retrosix.wiki/full-boot-from-bench-power

There is a lot of info about the OLED here :
https://files.zzattack.org/index.php?dir=img/console/switch/oled

Besides that, you also seem to have cut a trace near the emmc.
The Switch should give an error but it should not be unresponsive.

Not sure if those 2 planes are both GND but maybe remove this blob as well.

 

[Fede12]

Since things are so small, it can be a unintended solder blob somewhere.
You might have created a bridge on one of the components somewhere when removing the flex cables.
Or if one applies too much heat to a component like a capacitor, it might break and create a short as well.

A thermal cam will show near-shorts in capacitors (they get hot) but I don't know if that also helps finding a full short.
IPA alcohol can also sometimes help to see if anything gets hot because it evaporates quicker on hot components.
But a visual inspection of the areas where you worked is a good start.
Checking capacitors values won't help much as you already have a short.
You would have to remove them, check them and put them back.
Hunting down a bridged capacitor in a PS5 controller took me 2 weeks before finding it.
Just try looking at areas you worked on from different angles.

This site has some good information on all the power rails and what values to expect where.
It is for an original Switch though but the components are the same.
https://www.retrosix.wiki/full-boot-from-bench-power

There is a lot of info about the OLED here :
https://files.zzattack.org/index.php?dir=img/console/switch/oled

Besides that, you also seem to have cut a trace near the emmc.
The Switch should give an error but it should not be unresponsive.
View attachment 512276
Not sure if those 2 planes are both GND but maybe remove this blob as well.

View attachment 512277

thank you very much for the reply, ill look into these link for sure, for the trace i did it bcs i read it can cause missreading of the dat0 adapter and cutting it was for the best, for the blob thats the part that gets attached to the shield so its shorted, will def remove it to see tho

Post automatically merged: Jun 21, 2025

Ok so i tried to remove these two but the short is still there, no clue what it could be, might try a emmc resolder

(popped them up again)

Post automatically merged: Jun 22, 2025

Since things are so small, it can be a unintended solder blob somewhere.
You might have created a bridge on one of the components somewhere when removing the flex cables.
Or if one applies too much heat to a component like a capacitor, it might break and create a short as well.

A thermal cam will show near-shorts in capacitors (they get hot) but I don't know if that also helps finding a full short.
IPA alcohol can also sometimes help to see if anything gets hot because it evaporates quicker on hot components.
But a visual inspection of the areas where you worked is a good start.
Checking capacitors values won't help much as you already have a short.
You would have to remove them, check them and put them back.
Hunting down a bridged capacitor in a PS5 controller took me 2 weeks before finding it.
Just try looking at areas you worked on from different angles.

This site has some good information on all the power rails and what values to expect where.
It is for an original Switch though but the components are the same.
https://www.retrosix.wiki/full-boot-from-bench-power

There is a lot of info about the OLED here :
https://files.zzattack.org/index.php?dir=img/console/switch/oled

Besides that, you also seem to have cut a trace near the emmc.
The Switch should give an error but it should not be unresponsive.
View attachment 512276
Not sure if those 2 planes are both GND but maybe remove this blob as well.

View attachment 512277

FOUND IT!! The problem was emmc, removed now ill reinstall it, (taking advantage of this to avoid kamikaze )

ps: 330 degree celsius for the hot air station

Post automatically merged: Jun 22, 2025

 

[jkyoho]

the traces are just for those two test points from backlight ic. I cut it as well when doing emmc reball with dat0 jumper years ago.

 

[Fede12]

the traces are just for those two test points from backlight ic. I cut it as well when doing emmc reball with dat0 jumper years ago.

you are the one who suggested me to cut it a long time ago!

 

[jkyoho]

you are the one who suggested me to cut it a long time ago!

lol. can't remember, it was useful by transforming those test point into dat0 jumper node. But most of us tend to kamikaze way for less hassle and more clean finish

 

[Fede12]

lol. can't remember, it was useful by transforming those test point into dat0 jumper node. But most of us tend to kamikaze way for less hassle and more clean finish

tried on the reflow but the cable move also if i mask it, just ended up with kamikaze lol