Hacking Hardware Picofly - a HWFLY switch modchip

[DonZott]

Unknown rando store. Is that suppose to be HWfly-2040 ?

I know, store doesn't have the best rep. Found it by accident while looking for apu flex cables. It has a ras2040 chip on it so I guess.

 

[JoTiK]

As hard as soldering a picofly, the flex is better integrated though.
And it must fit without cutting the shield

 

[FreeLander]

Hello. So I used this point for 3v3 in my V1, but I think I gave it so much heat, now my Switch won't boot. I tried the other 3v3 point on the same side as RST, but again no luck.

What do you guys think?

 

[Dee87]

Hello. So I used this point for 3v3 in my V1, but I think I gave it so much heat, now my Switch won't boot. I tried the other 3v3 point on the same side as RST, but again no luck.

What do you guys think?

not alot we can see but always clean flux #

 

[FreeLander]

not alot we can see but always clean flux #

Sorry here hopefully better pictures. If we assume that his cap is damaged, would this explain the switch not booting?

 

[JoTiK]

I can see a solder blob on the bottom of the capacitor, if you soldered it here, this is the wrong side of the capacitor and you shorted your rp2040
If you had soldered it well try to remove everything and try to boot
Check if your capacitor is shorted

 

[FreeLander]

I can see a solder blob on the bottom of the capacitor, if you soldered it here, this is the wrong side of the capacitor and you shorted your rp2040
If you had soldered it well try to remove everything and try to boot
Check if your capacitor is shorted

Hello. That bottom cap was painful, but I soldered to the top of the lower one like the guide. I removed my rp2040 and all wires but the switch still won't boot. I tried the same rp2040 on another V2 Switch and it did work. What do you think happened here? When I used my multimeter the blob you were talking about was giving a beep with the top of the lower cap.

 

[JoTiK]

It shouldn't be beeping, the trace is shorted for sure but you have to determine if it's because of the capacitor or something else that went wrong. If you are comfortable with micro soldering you can remove the capacitor and check if the short is still present on the motherboard

 

[FreeLander]

It shouldn't be beeping, the trace is shorted for sure but you have to determine if it's because of the capacitor or something else that went wrong. If you are comfortable with micro soldering you can remove the capacitor and check if the short is still present on the motherboard

Alright. Nothing else to lose. Thanks, Will report back.

 

[cowboy619]

Hello. So I used this point for 3v3 in my V1, but I think I gave it so much heat, now my Switch won't boot. I tried the other 3v3 point on the same side as RST, but again no luck.

What do you guys think?

Cap is ripped you need to replace it


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[FreeLander]

Cap is ripped you need to replace it


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Thanks, would you happen to know the value?

 

[cowboy619]

Thanks, would you happen to know the value?

1uf 6.3v 0402


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[FreeLander]

It shouldn't be beeping, the trace is shorted for sure but you have to determine if it's because of the capacitor or something else that went wrong. If you are comfortable with micro soldering you can remove the capacitor and check if the short is still present on the motherboard

I desoldered the cap and checked it along with the trace. No continuity. Resoldered it and still won't boot.
Don't you just hate it when you mess up and don't even know why?

Would you tell me how do I check if the Switch is even getting power?

 

[cowboy619]

I desoldered the cap and checked it along with the trace. No continuity. Resoldered it and still won't boot.
Don't you just hate it when you mess up and don't even know why?

Would you tell me how do I check if the Switch is even getting power?

Check for shorts around m92 and p13


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[FreeLander]

Check for shorts around m93 and p13


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Hello. Thanks for getting back. That's too advance for me. I don't know where these are located.

 

[cowboy619]

Hello. Thanks for getting back. That's too advance for me. I don't know where these are located.

Send it for repairs then. Preferably a place that can microsolder


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[Dee87]

maybe

I desoldered the cap and checked it along with the trace. No continuity. Resoldered it and still won't boot.
Don't you just hate it when you mess up and don't even know why?

Would you tell me how do I check if the Switch is even getting power?

you might have fried ur m92 chip or p13 chip

 

[FreeLander]

Send it for repairs then. Preferably a place that can microsolder


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maybe

you might have fried ur m92 chip or p13 chip

Hello.
Thank you both.
I've learned how to check caps on M9, BQIC, and P13. I'm 100% all caps are not shorted. I was eager to check the cap on P13 as the guy was saying that the M9 cap ( the one I think I burned) is usually shorted alongside P13's cap, but that was not the case. If all caps are "fine" What else could be the issue for not booting?

Cowboy, Thank you, but I bought this Switch to learn to troubleshoot. I don't intend to play with nor sell it. I'm just enjoying this new hobby of modding electronics. I'm actually into health care and far away from this field, but the COVID era made me look for new passions. I would rather pay someone to teach me what's wrong with it rather than repair it. I appreciate your inputs and Dee too of course.

 

[Dee87]

do u have a usb meter?
see what it says its gonna give u a good idea what the issue is

if u dont have one i would suggest u get this one

UNI-T UT658​

u dont need to pay someone to teach u youtube is ur friend

 

[rr8400]

Hello! Currently having this issue:

Pkg1 decryption failed!
BEK is missing!
Failed to launch HOS!
Is this an issue with the chip installation or sd files? How do I fix it?