Hardware N3DS failing to POST after Hardmod

[MrInEthical]

Okay. So I attempted to do a hard mod directly to the motherboard to make a NAND backup which went perfectly fine and I made a backup but, to my surprise, whenever I try to turn the system on it makes a loud pop and the top screen flashes very briefly. I've checked all the ribbon cables and they look fine. As I was "interneting" I found many people saying that the problem only happens when a ribbon cable is damaged or loose but inot my case it isn't.
I looked closely at the motherboard and it seemed as if the resistor array to the left of the clock test pad (the one that says 095) had the bottom right two pins had been soldered together although I highly doubt it.
I don't want to risk damaging the device further but I want to know of this could cause the device to fail to boot

SOLVED: There was a 2 pin flat flex connector that I believe powered the cartridge board which was loose and needed to be taped down. Thanks to the people who helped

EDIT2: Ok, I've come to the conclusion that the resistor array i soldered together by accident has destroyed the WiFi functionality. The MAC address of the device shows up as all zeros and when I turn WiFi on, the device crashes. Rip me.

 

[Kubas_inko]

Same happened to me. Just disassemble and reassemble it. You have somewhere loosened ribbon cable. It can be on the mobo or on top screen on mini speaker mobo. Just make sure all your screen cables are as tight as possible, not only on mobo!!

BTW which sd card reader have you used?

 

[MrInEthical]

Same happened to me. Just disassemble and reassemble it. You have somewhere loosened ribbon cable. It can be on the mobo or on top screen on mini speaker mobo. Just make sure all your screen cables are as tight as possible, not only on mobo!!

BTW which sd card reader have you used?

I used a Transcend sd card reader but I'm not too sure what chip it uses. I'll check the top screen assembly tomorrow. Hope it works o7

 

[Kubas_inko]

I can say this for 100% it is caused by ribbon cable, but don't know which one or if it is ripped or just not tight enough.

 

[MrInEthical]

I can say this for 100% it is caused by ribbon cable, but don't know which one or if it is ripped or just not tight enough.

Well I've checked the cables and they seem to seated securely. I'm seriously beginning to think I may have damaged the motherboard

 

[Kubas_inko]

Have you unplugged and plugged them? They might look like they are securely connected, but don't have to be. Also, you might look at the screen, because there are some ribbon cables too.

 

[MrInEthical]

Have you unplugged and plugged them? They might look like they are securely connected, but don't have to be. Also, you might look at the screen, because there are some ribbon cables too.

Is the screen clipped on or glued? I don't want to damage he screen by taking it off the case

 

[MrInEthical]

Have you unplugged and plugged them? They might look like they are securely connected, but don't have to be. Also, you might look at the screen, because there are some ribbon cables too.

Dude it worked I love you omg you are the best person in the world...
Is what I thought until I put it all back together and it broke again. QQ

 

[Kubas_inko]

lol well, everything is possible, maybe you really somehow screw mobo. I still think it is problem with some ribbon cables, but I don't want to argue

 

[MrInEthical]

lol well, everything is possible, maybe you really somehow screw mobo. I still think it is problem with some ribbon cables, but I don't want to argue

I managed to fix it. Check the op

 

[MrInEthical]

Ok, I've come to the conclusion that the resistor array i soldered together by accident has destroyed the WiFi functionality. The MAC address of the device shows up as all zeros and when I turn WiFi on, the device crashes. Rip me.

 

[The Real Jdbye]

Ok, I've come to the conclusion that the resistor array i soldered together by accident has destroyed the WiFi functionality. The MAC address of the device shows up as all zeros and when I turn WiFi on, the device crashes. Rip me.

You desoldered them right?
Wifi board can be replaced, it shouldn't cost too much.

 

[MrInEthical]

You desoldered them right?
Wifi board can be replaced, it shouldn't cost too much.

Its the New 3ds, The WiFi chip is directly soldered to the board and I don't have a reflow oven to reflow the damaged resistor array.

 

[The Real Jdbye]

Its the New 3ds, The WiFi chip is directly soldered to the board and I don't have a reflow oven to reflow the damaged resistor array.

You don't need a reflow oven, just a steady hand.

 

[MrInEthical]

You don't need a reflow oven, just a steady hand.

I don't trust myself after what happened, my iron is really old and it has a really wide chisel tip which is already the thickness of the SMD.
Just to make sure, the WiFi SOC is the one right above the NAND SOC underneath the EMF shield right? It's hard to tell whether I damaged the resistor array and I don't want to damage it further by trying to fix something that isn't broken.

 

[Traace]

Hi, your solution to tape down the 2 pin flex located above the cartridge port works fine for me too. I guess its to power the top screen