Hello,
I've seen this issue in cases where the voltage is not set correctly.

What programmer are you using? A verbose log will also help.

On Mon, Oct 15, 2018 at 11:28 PM MIAN VEREST <mianverest@gmail.com> wrote:
Recently i start to use flashrom software, moreless in a winbond chip i receive this message, is probably IC could be damage? 

Waiting for your comments.

thanks in advance. 

Erasing and writing flash chip... Erase/write done in 8 min and 26 sec.
Verifying flash... FAILED at 0x00016650! Expected=0x3f, Found=0x3d, failed byte count from 0x00000000-0x007fffff: 0x2
Your flash chip is in an unknown state.





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