Panasonic Toughbook CF-33 mk1 BIOS repair
Good day,
I have tried to remove BIOS supervisor password from Panasonic Toughbook CF-33 mk1. Model number CF-33AENABTG, unfortunately I don't have any other info.
I read the BIOS using afuwin, edited it and tried to flash new edited BIOS using afuwin. Unsuccessfully. Afuwin showed "Error: Problem erasing flash." starting with 0x00040000 and stoped. Then I tried many other options to flash BIOS from Windows without any luck. Finally i rebooted the device - and no post. Afterwards I have read the corrupted bios chip (MX25L12873F) using EZP2010 programmer.
Now i have 3 ".bin" files (attached):
1) original BIOS read from Windows using Afuwin before corruption (only BIOS area)
2) BIOS read from Windows using Afuwin after corruption (FF'ed part of BIOS area)
3) dump read from the chip itself using EZP2010 programmer (whole chip, but corrupted)
BIOS areas in these files are not the same: difference is not only in Afuwin FF'ed area, but also some other places have slight differences (I don't know why - maybe Afuwin also edited this, maybe chip was read with errors, maybe ater unsuccessful POSTing there are made some changes in BIOS). I have tried to combine useful file using these files in many different variations without any luck - no post.
I tried to write the chip using clip without desoldering. Verification passes.
I thought that EZP2010 couldn't write these chips correctly, ordered and tried with CH341A - still no luck.
I have also read BIOS chip from another similar Panasonic CF-33 and flashed it to the bricked machine also without any luck - bricked machine doesn't post.
Maybe someone could have a look what i am doing wrong?
I have tried to remove BIOS supervisor password from Panasonic Toughbook CF-33 mk1. Model number CF-33AENABTG, unfortunately I don't have any other info.
I read the BIOS using afuwin, edited it and tried to flash new edited BIOS using afuwin. Unsuccessfully. Afuwin showed "Error: Problem erasing flash." starting with 0x00040000 and stoped. Then I tried many other options to flash BIOS from Windows without any luck. Finally i rebooted the device - and no post. Afterwards I have read the corrupted bios chip (MX25L12873F) using EZP2010 programmer.
Now i have 3 ".bin" files (attached):
1) original BIOS read from Windows using Afuwin before corruption (only BIOS area)
2) BIOS read from Windows using Afuwin after corruption (FF'ed part of BIOS area)
3) dump read from the chip itself using EZP2010 programmer (whole chip, but corrupted)
BIOS areas in these files are not the same: difference is not only in Afuwin FF'ed area, but also some other places have slight differences (I don't know why - maybe Afuwin also edited this, maybe chip was read with errors, maybe ater unsuccessful POSTing there are made some changes in BIOS). I have tried to combine useful file using these files in many different variations without any luck - no post.
I tried to write the chip using clip without desoldering. Verification passes.
I thought that EZP2010 couldn't write these chips correctly, ordered and tried with CH341A - still no luck.
I have also read BIOS chip from another similar Panasonic CF-33 and flashed it to the bricked machine also without any luck - bricked machine doesn't post.
Maybe someone could have a look what i am doing wrong?
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