Hardware Switch wont power on, making buzzing noise coming from the motherboard

[Winnppl]

Hi guys,

i'm trying to repair a Nintendo switch. it wont display anything on the screen when pressing the power button. I tried re-seating all the ribbon cables and plugs, but still no luck. when I plug the switch with the AC adapter without the battery plugged in I get this sound () when I plug in the switch with the AC adapter WITH the battery plugged in it makes this noise like its trying to start up and power cycle () but nothing still happens. I purchased a multimeter that beeps when set to continuity and it should be coming in soon so I can check all the resistors and capacitors, but is this a common issue? I think the issue might be from the p13usb chip.

Thanks!


Edit: Ok after getting a new Mulitmeter I have found some capacitors that are shorting in these photos. where should I look next?

 

[Patapon3321]

I dont think thats the P13USB, maybe the Realtek Sound IC or more worst the Nvidia Chip.

 

[Winnppl]

I dont think thats the P13USB, maybe the Realtek Sound IC or more worst the Nvidia Chip.

Thanks, yeah hopefully its not the Nvidia chip.. what is the chip name of the Realtek sound IC?

 

[Patapon3321]

Thanks, yeah hopefully its not the Nvidia chip.. what is the chip name of the Realtek sound IC?

the orange one

Now I think this cant be the Realtek IC

 

[Winnppl]

the orange one

Now I think this cant be the Realtek IC

You don't think its the Realtek IC causing the issue? I have a multimeter on the way, mine I have now does not beep for continuity, so ill check the resistors around the chip when it comes in.

 

[andres1234]

i think can be a capacitor smd in short i have a similar problem in the past and problem is A capacitor smd in short, not ic was a smd

 

[Winnppl]

i think can be a capacitor smd in short i have a similar problem in the past and problem is A capacitor smd in short, not ic was a smd

Thanks for the response. i'm not sure where that is, but I want to learn. I will check it out when I get my multimeter.

Thanks again!

 

[andres1234]

Thanks for the response. i'm not sure where that is, but I want to learn. I will check it out when I get my multimeter.

Thanks again!

they look like this, check in youtube how test this pieces.

 

[Winnppl]

Thank you for your help, I see those on my motherboard, what ones near what chip did you change out? that's the ones near the bq23193 chip.

 

[andres1234]

Thank you for your help, I see those on my motherboard, what ones near what chip did you change out? that's the ones near the bq23193 chip.

u have multitester now?

 

[Winnppl]

u have multitester now?

I have one, but not one that beeps when the capacitor has continuity. I have one on the way that does arriving in a few days.

 

[andres1234]

I have one, but not one that beeps when the capacitor has continuity. I have one on the way that does arriving in a few days.

checks others, in the past y have short near BQ IC and the short was in other place.

 

[NaniMael]

same... motherboard not short.. ic bq & pusb & m93t change.. same

 

[Winnppl]

same... motherboard not short.. ic bq & pusb & m93t change.. same

You are saying you changed out those chips but still having issues?

 

[NaniMael]

You are saying you changed out those chips but still having issues?

Yes. Symptoms remain the same after replacement.

I haven't seen any examples of solving this problem.

Chip I replaced m92t36, bq24183, p13usb

It is clear that there is a problem elsewhere.

 

[bombob]

Check the caps under the SOC (back of the board,middle area) if you have shorts there, you mostly have a goner unfortunately

 

[NaniMael]

Check the caps under the SOC (back of the board,middle area) if you have shorts there, you mostly have a goner unfortunately

Is it resistance?

What exactly is it?

 

[bombob]

Is it resistance?

What exactly is it?

Yes this should be a small resistor. The capacitors are the brown ones

Sent from my SM-N960U using Tapatalk

 

[NaniMael]

Yes this should be a small resistor. The capacitors are the brown ones

Sent from my SM-N960U using Tapatalk

Short and value ohms?

capacitors not short

Only this resistance is short circuit.

 

[Pintglass]

That resistor is low ohm’s or even 0 ohm’s not sure but it will buzz your multimeter if your using it to test for shorts.

Check the big coil next to bq24193 if your getting humming