Hardware Hacking Fan constantly on when switch is off, then turns off when switch is on

Synxx

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So I recently installed a hwfly to my switch oled. All works fine, get the green light and boots to hekate with the files loaded onto the sd card.

Decided to put the console all back together. Got to plugging the battery in before I put the heat shield on and the fan started spinning. Tried unplugging the battery and then putting it back and still did same thing.

I then turned on the console and the fan immediately stopped. I booted ofw and played a game for awhile but still no fan came on. Turned off the console and the fan came on.

Anyone have any idea why this is happening or what I can check please? If pics are needed just let me know what to take a pic of and I'll get it up.

Thankyou for any help or information provided.
 

kylum

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Sounds like a short. Check for bridging and solder splashes. Inspect the ribbon cable,connector, and pins to the fan for damage as well. Posting some hi rez pics would help others in assisting your problem!
 

Synxx

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Sounds like a short. Check for bridging and solder splashes. Inspect the ribbon cable,connector, and pins to the fan for damage as well. Posting some hi rez pics would help others in assisting your problem!

Thanks for the reply. Is there a certain point of the board I should take pictures of to upload?
 

kylum

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The areas you soldered to, around the fan connector and anything that looks like possible damage. Diligently inspect your work and surrounding areas and fan connector/ribbon!
 

Dabiolos

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I only repaired my own switch so far but I watched a lot of videos from tronicsfix and the TheCod3r on YouTube before I started. So I would say look for shorts around the m92 ( On the MOSFETs) maybe.

I remember seeing a video where one of them explains that the fan is connected to the m92 over a MOSFET and sharing power with the joy con rail.

Are your joycons charging fine?
 

Synxx

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The areas you soldered to, around the fan connector and anything that looks like possible damage. Diligently inspect your work and surrounding areas and fan connector/ribbon!
Apologies for my slow replies, working odd hours this week. I'll get some pics up as soon as I can.
Looking at it I can't see any damage, I used to do the rgh installs on the xbox 360's, so I'm not someone who has just picked up a soldering iron and though I can do this haha.

But I also understand the need for pics as I saw some shocking soldering work back then when people thought they did a good job and wondered why it didn't work so no worries.

The fan ribbon looks good, i tried another fan and got the same problem too. Can't really say about the fan connector as I can't really see much.
I only repaired my own switch so far but I watched a lot of videos from tronicsfix and the TheCod3r on YouTube before I started. So I would say look for shorts around the m92 ( On the MOSFETs) maybe.

I remember seeing a video where one of them explains that the fan is connected to the m92 over a MOSFET and sharing power with the joy con rail.

Are your joycons charging fine?
Hi there, the joycons are recognised and working fine. They have a battery bar under them. But I have noticed if I plug the USB charging cable in then they have this weird glitchy charging animation like the charge is going to them on and off really quickly. The console charge bar is fine though.

I will have a check of the mosfets and see if anything is wrong.
 
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