M92 USB mass storage problems

bob_tm · 07-05-2012, 08:26 AM

Hi,

I've had my M92 for a few weeks now and I'm having problems with USB mass storage when connecting it to a computer (I've tried connecting to several computers, both Windows, Linux and OSX). Approx 2 out of 3 attempts yields no USB storage (nothing is show in the dmsg USB debug info when hooking it up to a Linux box).

What happens when connecting the M92 via USB is that the M92 starts charging (this happens every time), but (more than half the time) no USB mass storage is registered on the computer. I've tried several USB cables and there is no difference between them. I also doubt that this is due to the micro-USB plug on the M92 as reported elsewhere, as sometimes moving the computer side of the cable from one USB port to another without touching the M92 side of the cable may cause mass storage to appear.

I'm running firmware 1.6.

Anyone else having this problem or hints as to how to troubleshoot it?

all the best,

bob_tm

colibri · 07-05-2012, 02:45 PM

Is your device running while you are connecting it to your computer?

bob_tm · 07-06-2012, 05:09 AM

Yes, Colibri. I've never gotten the M92 to connect while being off.

vowl · 07-07-2012, 12:38 AM

I believe it is a USB connection problem. From time to time, my M92 failed to be re-charged because of the *poor* physical contact on the USB plug. Replacing the USB cable, the re-charging is OK. (It seems that the plug of the mini USB of the free USB cable from Onxy does not meet the standard.)

bob_tm · 07-07-2012, 07:40 AM

Yeah, it might be so, Vowl, even though using another cable doesn't seem to change things. I guess I will have to open it up and have a closer look at the connector (the soldering and the connector lines) on the M92. Is there a sevice manual available anywhere? Returning it for repair will cost too much.

colibri · 07-07-2012, 08:57 AM

Here is a disassembleinstruction:

https://www.mobileread.com/forums/sho...d.php?t=178058

07-05-2012, 08:26 AM	#1
bob_tm Enthusiast Posts: 32 Karma: 10 Join Date: Jan 2011 Device: Kindle 3 WiFi, Onyx M92	M92 USB mass storage problems Hi, I've had my M92 for a few weeks now and I'm having problems with USB mass storage when connecting it to a computer (I've tried connecting to several computers, both Windows, Linux and OSX). Approx 2 out of 3 attempts yields no USB storage (nothing is show in the dmsg USB debug info when hooking it up to a Linux box). What happens when connecting the M92 via USB is that the M92 starts charging (this happens every time), but (more than half the time) no USB mass storage is registered on the computer. I've tried several USB cables and there is no difference between them. I also doubt that this is due to the micro-USB plug on the M92 as reported elsewhere, as sometimes moving the computer side of the cable from one USB port to another without touching the M92 side of the cable may cause mass storage to appear. I'm running firmware 1.6. Anyone else having this problem or hints as to how to troubleshoot it? all the best, bob_tm

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07-05-2012, 02:45 PM	#2
colibri Member Posts: 11 Karma: 28 Join Date: Apr 2012 Device: M92	Is your device running while you are connecting it to your computer?

07-06-2012, 05:09 AM	#3
bob_tm Enthusiast Posts: 32 Karma: 10 Join Date: Jan 2011 Device: Kindle 3 WiFi, Onyx M92	Yes, Colibri. I've never gotten the M92 to connect while being off.

07-07-2012, 12:38 AM	#4
vowl Junior Member Posts: 1 Karma: 10 Join Date: Jun 2012 Device: Kindle 3, Onxy M92	I believe it is a USB connection problem. From time to time, my M92 failed to be re-charged because of the poor physical contact on the USB plug. Replacing the USB cable, the re-charging is OK. (It seems that the plug of the mini USB of the free USB cable from Onxy does not meet the standard.)

07-07-2012, 07:40 AM	#5
bob_tm Enthusiast Posts: 32 Karma: 10 Join Date: Jan 2011 Device: Kindle 3 WiFi, Onyx M92	Yeah, it might be so, Vowl, even though using another cable doesn't seem to change things. I guess I will have to open it up and have a closer look at the connector (the soldering and the connector lines) on the M92. Is there a sevice manual available anywhere? Returning it for repair will cost too much.

07-07-2012, 08:57 AM	#6
colibri Member Posts: 11 Karma: 28 Join Date: Apr 2012 Device: M92	Here is a disassembleinstruction: https://www.mobileread.com/forums/sho...d.php?t=178058

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