David Duffy wrote


> Roger Weichert wrote:
>> I'm just having a heart attack!!!   I just erased 10 x 27C256 eproms,=20
>> burnt
>> an updated software version on them and now they appear dead when I plug
>> them in.
>>
>> They all verified the same as the master (and still do) and the checksum=
s
>> are all the same. The master eprom works in the circuit, but none of the
>> copies.I've also pulled out some new ones and programmed them with same
>> result.
>>
>> I'm hoping I'm missing something obvious, but it doesn;t make sense.
>>
>> I'd already spent all afternoon trying to reload the library on the=20
>> Dataman
>> S4 that I use, and it finally worked. After that everything else seemed=
=20
>> ok
>> ... until now.
>>

> Did you make sure the eproms had cooled down after being erased?
> David...
> --=20

No I didn't. I can see I'm going to show my ignorance here, but I didn't=20
know that was important. Gulp.

Does that mean I can erase them again  ..  let them cool down and try again=
=20
.... or are they stuffed?

Regards,  Roger

although the new ones=20

--=20
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