Switch Lite SD card reader issue

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thebroodian

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I installed a picofly into a switch lite, and the modchip appears to work, screen goes to the expected raspberry pi logo "No SD Card" screen, excellent. However, I then discovered that the SD Card reader doesn't read any card at all. The OFW also doesn't throw any error codes or anything like that when I insert an SD card. Through testing I discovered that the cap above the SD card slot isn't receiving any voltage at all. Does anybody know where upstream I might check to look for a break in the trace, or anything like that?

Photos:
Post automatically merged:

I found the trace from the VCC of the cap to its next neighbor, it leads to the bottom pin of a transistor (image here: ). The transistor is getting voltage on its upper pins. Does that mean that the transistor is bad?
Post automatically merged:

Can anybody ID this component?

 
Last edited by thebroodian,
I installed a picofly into a switch lite, and the modchip appears to work, screen goes to the expected raspberry pi logo "No SD Card" screen, excellent. However, I then discovered that the SD Card reader doesn't read any card at all. The OFW also doesn't throw any error codes or anything like that when I insert an SD card. Through testing I discovered that the cap above the SD card slot isn't receiving any voltage at all. Does anybody know where upstream I might check to look for a break in the trace, or anything like that?

Photos:
Post automatically merged:

I found the trace from the VCC of the cap to its next neighbor, it leads to the bottom pin of a transistor (image here: ). The transistor is getting voltage on its upper pins. Does that mean that the transistor is bad?
Post automatically merged:

Can anybody ID this component?


It's a n-channel mosfet used primarily to communicate from a usb device to the serial bus. For example when a thumb drive is inserted into a usb port a n-channel mosfet inside the drive passes specified voltage to the bus and that IDs it as external storage .
 

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