Hardware Nintendo switch Board draws 0.46 A and doesnt boot

Xandroz · Jul 11, 2020

Hey guys, so i bought a busted switch a while back, which doesnt boot, i check all caps nothing shorting, checked the amps drawn its just a steady 0.46
Doesnt jump to quick charge and doesnt power on

any recommendation or its a dead one

MicroRepairRX · Jul 12, 2020

Have you tried using a known good battery with a charge? If it's a charging issue, then the Switch should boot with a known good battery.

Did you check the caps around the P13USB chip near the 4 hdmi filters?

Xandroz · Jul 12, 2020

I checked the caps nothing is shorting
And yea the battery is charged and good.
Whst are the hdmi filters you are talking about

i checked all 3 chips and the video chip at the back nothing shorts
It came for a repair, like a year ago and i told the customer to pick it up, and he vanished
No sign if previous repairs as well
So wanted to revive it and use it or just leave it for spare parts

LIY2012 · Jul 15, 2020

Are you sure it's a hardware issues? It could be a firmware issue. If the firmware isn't loading properly, it won't switch to fast charging and could have a blank display. If it's unpatched, you can rebuild the firmware.
Can you put it into RCM mode?

Xandroz · Jul 16, 2020

Tried removing the nand and plugging it back it, nothing, i tested all caps today, nothing shorts
I belive thats a goner with a cpu issue

Modificatorul · Jul 16, 2020

Is not clear to my if you tested for autorcm or is a patched unit? try to see if tegra rcm show something, install tegra rcm installt the drivers, conect to pc with usb c cable and press power , or remove the nand and connect to pc and press power

Xandroz · Jul 19, 2020

Yea the moment i got it i tried to inject a payload using an rcm loader didnt do anything.
Will try the nand tommorow

LIY2012 · Jul 19, 2020

You call tell if it's patched or unpatched by looking at the response.

If it says "Smashed the stack with a 0x7000 byte SETUP request!" it's unpatched.

If it says "Smashed the stack with a 0x0000 byte SETUP request!" it's patched.

Xandroz · Jul 21, 2020

Nothing happens no rcm, and the unit is exploitable btw.
It draws a steady 0.46 amps and doesnt jump to quick charge, nothing on the screen what so ever

Xandroz · Jul 22, 2020

I am having a short at the cpu

i you guys think thats a dead cause or what should i do

Modificatorul · Jul 22, 2020

Xandroz said:
I am having a short at the cpu

i you guys think thats a dead cause or what should i do

So no shorts on caps around m92t,pi3 usb,bq24193
Caps on cpu are low resistance.
Test caps around bouth MAX77621AEWI+T ignore the inductors, test data + data - for short to ground, test if 3.3 v is present.

Picture stolen from @mattytrog thread.

LIY2012 · Jul 23, 2020

Check the filter on the D+ and D- lines, and the 3.3v rail. You should be able to get RCM as long as you have power to the SOC and the data lines connected. Check for continuity between the blue and yellow points.

Xandroz · Jul 24, 2020

LIY2012 said:
Check the filter on the D+ and D- lines, and the 3.3v rail. You should be able to get RCM as long as you have power to the SOC and the data lines connected. Check for continuity between the blue and yellow points. View attachment 218414 View attachment 218415

i tested for continuty and every thing beeps and looks ok

i dont know honesty how to use a amp meter to measure volts

never did because i never had to use it before, i tried several points but im grtting werid readings and sometimes 0
Not sure if im doing anything wrong or what

but the symptoms of the console i got for free and trying to fix is that the suer reported it was working and all of a sudden stopped working or charging
I suspected one of the chips to be faulty no shorts what so ever
Got the volt meter to measure the amps and kts a steady 0.48
Only thing i can see wrong is the cpu resistor i highlighted earlier that is shorting
Shall i remove it

i am pretty sure from watching all these tronic fix videos and northbridge repairs that this is cpu related, and they just threw these boards out

LIY2012 · Jul 24, 2020

If your going to throw it away, send it to me. I'll pay for shipping.

Seriously though, as far as the capacitor on the SOC, the one you showed should be very low resistance, (like 0.1ohm), it's not a problem.

Were you able to check the voltage rails in the 2nd picture. Put the VOM meter into voltage mode, put the black lead on the GND, (anything metal should be ground, for example the USB port shield or the SOC cover, etc.) and the red lead on the different voltage points and see if they read OK. (You'll have to do it with the board powered on to read the correct voltages.)

Xandroz · Jul 24, 2020

LIY2012 said:
If your going to throw it away, send it to me. I'll pay for shipping.

Seriously though, as far as the capacitor on the SOC, the one you showed should be very low resistance, (like 0.1ohm), it's not a problem.

Were you able to check the voltage rails in the 2nd picture. Put the VOM meter into voltage mode, put the black lead on the GND, (anything metal should be ground, for example the USB port shield or the SOC cover, etc.) and the red lead on the different voltage points and see if they read OK. (You'll have to do it with the board powered on to read the correct voltages.)

egypt bro, shiping will cost the price of a new board

wel i tested both your pics you placed
1st pic no volts what so ever showing the one with the joycon rails shared by npav
2nd picture with all the numbers i got the following

4.1
0
4.1
0
0.4
5
5

Although im not getting any shorts, do you recommend any chip that might be faulty without shorts

Xandroz · Jul 25, 2020

I placed a good charged battery and the same thing, doesnt power and 0.46 A steady
I belive its one of these weird ones.
Will keep it as a doner board for any thing that comes my way, that may need a spare

ntinovs · Sep 10, 2020

LIY2012 said:
Check the filter on the D+ and D- lines, and the 3.3v rail. You should be able to get RCM as long as you have power to the SOC and the data lines connected. Check for continuity between the blue and yellow points. View attachment 218414 View attachment 218415

Hi. I have a Nintendo switch that doesn't pass the Nintendo switch boot logo. It charges fine and all capacitors seem ok (they don't short). I came accross your voltage diagram and I noticed that I get wrong voltages at 3 points (see attached picture). Do you guys have any idea what might be the problem? Shall I go ahead and change the m92t chip? Any other thoughts?

peepy · Sep 21, 2020

ntinovs said:
Hi. I have a Nintendo switch that doesn't pass the Nintendo switch boot logo. It charges fine and all capacitors seem ok (they don't short). I came accross your voltage diagram and I noticed that I get wrong voltages at 3 points (see attached picture). Do you guys have any idea what might be the problem? Shall I go ahead and change the m92t chip? Any other thoughts?View attachment 224457

I have the exact same readings as you on those points did you ever fix it?

ntinovs · Sep 22, 2020

peepy said:
I have the exact same readings as you on those points did you ever fix it?

Unfortunately not. But I haven't tried any fixes. I would suggest starting 'simple' and check the software (try hekate if your switch is exploitable). Then try replacing the charging/power related chips. If this doesn't fix it then maybe check the wifi chip. If this doesn't work either my conclusion would be bad emmc or soc.

peepy · Sep 22, 2020

ntinovs said:
Unfortunately not. But I haven't tried any fixes. I would suggest starting 'simple' and check the software (try hekate if your switch is exploitable). Then try replacing the charging/power related chips. If this doesn't fix it then maybe check the wifi chip. If this doesn't work either my conclusion would be bad emmc or soc.

any guides on hekate? how can I check i its exploitable? I doubt it is it looks pretty new. I know where to find the number to check if its exploitable for a switch that will boot but not on a non booter

well holy crap its exploitable and rcm detects it maybe its just stuck in rcm maybe the previous owner put it in rcm and its stuck there, i tried pressing the power button a million times for 15 seconds and it didnt boot so I guess ill have to investigate how rcm works

Hardware Nintendo switch Board draws 0.46 A and doesnt boot

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