MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X,3X,4X & GQ-4x4)
 Data line stuck to +5V on GQ-4X

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T O P I C    R E V I E W
n_arno Posted - 04/25/2014 : 12:25:19
Hi All,

I have a problem with my GQ-4X. I has worked from quite some time, but now, i keep getting a verify failed when burning M27C801 (or M27C322 with the 16bit adaptator).

The main problem seems to be that D7 is stuck to +5V (check image attached for a diff between written and re-read file).

Image Insert:

56.81 KB

Is there a way to diagnose if this is a firmware problem which could be fixed by "reflashing" the programmer (is it even possible to do so) or if there is a component which started acting weird (a quick check shown no dead component).

Thanks in advance.

Best Regards,

Arnaud

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