MCUmall EPROM BIOS Chip Burner Forum
MCUmall EPROM BIOS Chip Burner Forum
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 True USB Willem Programmer (GQ-2X, GQ-3X, GQ-4X)
 GQ-4X can't erase 28F400 -=SOLVED=-
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ZRimas

14 Posts

Posted - 09/03/2016 :  10:43:53  Show Profile  Reply with Quote
Hi!

Recently I got problem: original GQ-4X can read and verify 28f400 w/o problems, but when I try to erase the flash, it comes to 100% and the software hangs up with programmer's all 3 LEDs ON. Software update to the newest and computer change did not help.

Any ideas?

Image Insert:

83954 bytes

Edited by - ZRimas on 10/02/2016 12:17:57
Reply #1

ZLM

2923 Posts

Posted - 09/03/2016 :  21:59:31  Show Profile  Reply with Quote
The chip may be a bad chip.

Try another chip if possible.
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Reply #2

ZRimas

14 Posts

Posted - 09/04/2016 :  11:16:47  Show Profile  Reply with Quote
My first ideee was also the same. Tried many, result was the same.
Adapter is the same as before. Checked it visually - no damage.

Edited by - ZRimas on 09/04/2016 11:20:37
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Reply #3

ZLM

2923 Posts

Posted - 09/05/2016 :  21:01:18  Show Profile  Reply with Quote
The damaged chip may not be visible.
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Reply #4

ZRimas

14 Posts

Posted - 09/11/2016 :  09:15:59  Show Profile  Reply with Quote
5 chips in the row?
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Reply #5

ZLM

2923 Posts

Posted - 09/11/2016 :  13:47:53  Show Profile  Reply with Quote
Those chips are locked? In that case the check may not be able to erase.
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Reply #6

ZRimas

14 Posts

Posted - 09/11/2016 :  23:10:35  Show Profile  Reply with Quote
No, they are not
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Reply #7

ZRimas

14 Posts

Posted - 10/02/2016 :  07:43:45  Show Profile  Reply with Quote
The problem was faulty ZIF socket :(
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