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USB Key 32GB - Drive not detected at all, little LED is on
http://forum.hddguru.com/viewtopic.php?f=10&t=39727		 Page 1 of 1
Author:  samstown [ April 16th, 2020, 14:54 ]
Post subject:  USB Key 32GB - Drive not detected at all, little LED is on
Hi guys,

I got that USB Key 32 GB. The drive is not detected at all however the little led does turn on red, steady, not flashing. I am looking for the oscillator but it must be SMD and I am not sure which one. I tried searching using the info on PCB but can't find anything relevant.

Thanks
Sam

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Author:  pepe [ April 16th, 2020, 17:06 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
That controller is probably using an internal oscillator.
I would check in the device manager, if it comes up in the disk drives section as the controller name with 0 capacity.
If it does, the problem is probably in the NAND.

pepe
Author:  samstown [ April 17th, 2020, 2:49 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
pepe wrote:
That controller is probably using an internal oscillator.
I would check in the device manager, if it comes up in the disk drives section as the controller name with 0 capacity.
If it does, the problem is probably in the NAND.

pepe

It's odd as there's nothing on W10 Disk Management or MacOS disk Utility however the light is on. It looks like controller doesn't talk to PC ?

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WhatsApp Image 2020-04-17 at 08.28.46.jpeg
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Author:  pepe [ April 17th, 2020, 5:17 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
It would take at least an oscilloscope to check if it really talks over the usb (or a proto analyzer) and the NAND.
There's not much you can do without tools, apart from checking broken soldering...
pepe
Author:  samstown [ April 17th, 2020, 6:06 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
pepe wrote:
It would take at least an oscilloscope to check if it really talks over the usb (or a proto analyzer) and the NAND.
There's not much you can do without tools, apart from checking broken soldering...
pepe

Yeah, I'll get an oscilloscope today.
Author:  samstown [ April 18th, 2020, 8:09 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
I've made some progress. I've connected 5V to controller U1, now USBkey is recognized by PC. I can't yet access data, USB is listed but not can't initialize it, doesn't report capacity. I am sharing if that can help someone.

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WhatsApp Image 2020-04-18 at 14.01.40.jpeg
WhatsApp Image 2020-04-18 at 14.01.40.jpeg [ 155.97 KiB | Viewed 8966 times ]
Author:  samstown [ April 18th, 2020, 8:27 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
Looks like the problem is the "write-protect" now.

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Author:  pepe [ April 18th, 2020, 8:29 ]
Post subject:  Re: USB Key 32GB - Drive not detected at all, little LED is
i guess it is time for a chip-off. Can you handle it?
pepe
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