Try to shorten the wires between SOIC8 and CH341A and/or replace them with the copper ones, maybe that would help.
On Sun, Dec 29, 2019 at 9:00 PM AL VAN DER LAAN <[email protected]> wrote: > > I am trying to flash the HP Elitebook 850 G2 - as mentioned three went > succesful but the one I forgot to erase first did not. I have read up a lot > about this in the various forums. I tried with -f and it seems part of the > bios chip is actually locked. The laptop still boots properly and I can > install Windows on it but cannot change any of the bios settings as the TPM > is preventing me to manipulate it. I mean it is not too bad these units are > going into the resale channel but not the one with the locked bios. I will > see if there are any samples, and if I am successful I will upload my process. > > > > On Dec 29, 2019, at 12:42 PM, Mike Banon <[email protected]> wrote: > > > > You haven't described what device you are trying to flash. Usually > > there's nothing wrong with using SOIC8 test clip, for the laptops. > > However, some routers/hdmi recorders/other devices of this type, may > > try powering its' main CPU from a test clip and interfere with your > > programming through a test clip. In example, here's a flashrom mod I > > had to do for making it possible to read a firmware of one router > > through a test clip https://review.coreboot.org/c/flashrom/+/31830 > > (because a CPU tries to power itself from a test clip and access a > > flash chip, its' only available for 30% of each second to a programmer > > behind a test clip), however - despite a similar code for read and > > write - this router becomes software bricked if a write has been > > attempted, and then a chip is inaccessible at all without a > > desoldering. > > > > So a chip itself could be fine, and such problems could be caused by > > an imperfection in your device's hardware design. Other problems could > > be i.e. too long cables between a SOIC8 test clip and a programmer, or > > their poor quality (i.e. electrical resistance of aluminium wires is > > about 1.5x times higher than of the copper ones with the same > > properties). > > > > On Sun, Dec 29, 2019 at 8:32 PM AL VAN DER LAAN <[email protected]> wrote: > >> > >> Hi Mike, thanks for responding. I tried with Linux as well and am using > >> the SOIC8. I think I did mess up when I forgot to Erase and performed a > >> write to it (it should still erase before the write but here we are). I > >> performed the same tasks on three other units that came out of an auction > >> and successfully reprogrammed them with a bios file obtained from HP. > >> > >> I am thinking of ordering a couple clean ones from eBay and desolder the > >> defective one. > >> > >> And I know, everyone keeps telling me to stop using the SOIC8, but I > >> simply have too much volume with a huge backlog. > >> > >> > >> > >>> On Dec 29, 2019, at 11:18 AM, Mike Banon <[email protected]> wrote: > >>> > >>>> MX25L12835F/MX25L12845E/MX25L12865E > >>> This doesn't seem to be one-time-programmable. Have you tried flashing > >>> it on Linux instead of OS X ? Are you doing ISP (In system > >>> programming, i.e. with a test clip like SOIC8 or SOIC16) ? At the > >>> moment it's unclear to me why your erase operation is failing... > >>> > >>> On Fri, Dec 27, 2019 at 10:34 PM AL VAN DER LAAN <[email protected]> > >>> wrote: > >>>> > >>>> Happy Holidays, > >>>> > >>>> > >>>> So this happened: I forgot to Erase the EEPROM, which clearly is my > >>>> fault, but it was late and I was tired. > >>>> > >>>> Just trying to see if I can recover this EEprom at all or if I am better > >>>> getting a couple of new ones from eBay? > >>>> > >>>> > >>>> > >>>> > >>>> flashrom -p ch341a_spi -E -c MX25L12835F/MX25L12845E/MX25L12865E -f > >>>> flashrom v1.1 on Darwin 19.2.0 (x86_64) > >>>> flashrom is free software, get the source code at https://flashrom.org > >>>> > >>>> Calibrating delay loop... OK. > >>>> Found Macronix flash chip "MX25L12835F/MX25L12845E/MX25L12865E" (16384 > >>>> kB, SPI) on ch341a_spi. > >>>> Erasing and writing flash chip... FAILED at 0x00000000! Expected=0xff, > >>>> Found=0x40, failed byte count from 0x00000000-0x00000fff: 0x1000 > >>>> ERASE FAILED! > >>>> Looking for another erase function. > >>>> FAILED at 0x00000000! Expected=0xff, Found=0x40, failed byte count from > >>>> 0x00000000-0x00007fff: 0x8000 > >>>> ERASE FAILED! > >>>> Looking for another erase function. > >>>> FAILED at 0x00000000! Expected=0xff, Found=0x40, failed byte count from > >>>> 0x00000000-0x0000ffff: 0x10000 > >>>> ERASE FAILED! > >>>> Looking for another erase function. > >>>> ^[[B^[[B^[[B^[[BFAILED at 0x00000000! Expected=0xff, Found=0x40, failed > >>>> byte count from 0x00000000-0x00ffffff: 0x1000000 > >>>> ERASE FAILED! > >>>> Looking for another erase function. > >>>> FAILED at 0x00000000! Expected=0xff, Found=0x40, failed byte count from > >>>> 0x00000000-0x00ffffff: 0x1000000 > >>>> ERASE FAILED! > >>>> Looking for another erase function. > >>>> Looking for another erase function. > >>>> Looking for another erase function. > >>>> No usable erase functions left. > >>>> FAILED! > >>>> Your flash chip is in an unknown state. > >>>> Please report this on IRC at chat.freenode.net (channel #flashrom) or > >>>> mail [email protected], thanks! > >>>> _______________________________________________ > >>>> flashrom mailing list -- [email protected] > >>>> To unsubscribe send an email to [email protected] > >> > _______________________________________________ flashrom mailing list -- [email protected] To unsubscribe send an email to [email protected]
