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Unfortunately I don't have any soldering tools or experience, so if you could give an advice<br>
about ISP programming (In-System-Programming/In-Situ-Programming) , it will be super helpful!<br>
<br>
I teardown a bricked laptop, removed AC power, laptop's power battery, and even a small CMOS battery,<br>
and now I am trying to write a working BIOS image to laptop's SPI flash chip using a SOIC8 test clip.<br>
<br>
But here is a problem: I could read a dump from this BIOS chip without problems, however<br>
it fails when I am trying to write - so the contents of BIOS flash chip are remaining unchanged.<br>
Luckily I found out this helpful wiki page - http://flashrom.org/ISP , which describes common problems<br>
with this ISP method of flashing, as well as gives 3 hints for solution! Sadly this page is currently down,<br>
so here is a screenshot: http://i.imgur.com/SJEYHR2.png<br>
<br>
1. - tried to make shorter wires, less than 10cm as they recommend - it did not help<br>
2. - soldering is out of possibility, cant do it, and also: wires are already short and they are good quality (pure copper)<br>
3. - This hint looks more promising, but I need help in understanding this piece of information:<br>
"disconnect Vcc from the programmer and power it with its normal PSU"<br>
<br>
If I understand correctly, by Vcc they mean Vcc pin of the BIOS flash chip.<br>
But if I disconnect Vcc from the programmer, what is "normal PSU" which should power this Vcc pin?<br>
<br>
Should I connect to motherboard a laptop's power battery, or small CMOS battery, or AC adapter of laptop,<br>
so that this Vcc pin would be powered by them, or it is forbidden to do it while using SPI programmer in the same time?<br>
Or its better to try to power Vcc of flash chip from "USB to TTL" adapter - which has this 3V3 (3.3V) voltage pin?<br>
<br>
Yours faithfully,<br>
Robert Brown
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