| T O P I C R E V I E W |
| pmugabi |
Posted - 02/02/2012 : 22:57:46
My 3 year old GQ-4X has suddenly stopped working. When plugged in, it displays Unknown USB device.This happened after writing to some dodgy SST 27SF512 chips. The reason I think they were not genuine was because I was not able to erase them after writing to them. I have re-installed Windows twice without any improvement. I have also tried using another computer. I have also tried supplying 9V DC.
I was able to revive it once by repeated plugging in and out. It worked after 20 tries of that. However since then it's not worked. I have also tried another USB cable without success.
Shipping it back to Mcumall is not possible since that would cost more than another programmer.
Mcumall support: Is there any kind of guide you can give me to check and repair whatever has failed in the programmer? If there are capacitors or resistors that might have caused this, I would be able to fix it, if it's something more complex, I'd have to write it off and buy another one.
Thanks. |
| 5 L A T E S T R E P L I E S (Newest First) |
| pmugabi |
Posted - 02/08/2012 : 01:28:29
Just before I trashed the programmer, I found that the 2nd cable I had tried was faulty as well. I did this by trying it on another device (printer). So I bought yet another cable and it's now working perfectly.
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| pmugabi |
Posted - 02/06/2012 : 04:47:55
Thanks for the feedback.
A new programmer it is then |
| ZLM |
Posted - 02/05/2012 : 11:07:04
The programmer USB chip may be the problem. You may not be able to fix it yourself. |
| pmugabi |
Posted - 02/05/2012 : 02:44:35
As written in the original post, I already tried another computer and cable. I was hoping for some info on whether the programmer can be fixed. |
| ZLM |
Posted - 02/03/2012 : 22:13:07
Change to another computer and USB cable. If it still does not work, then the programmer may have problem. |
