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Rewrite BIOS Toshiba, advice needed

IonutS

Junior Member
I have Toshiba Satellite L40-14B (Catalog Number: PSL4CE-004005G3) :'(

I downgraded my Laptop to WinXP (from Vista) and I wanted to update BIOS with Toshiba version for XP (5.50). I did all right but … even 2 seconds after clicking the .bat file to launch the process, Windows has interfered with a critical message and restart my computer. 😡

It restarted, (***) entered "BIOS ROM Utility V1.16 Crisis Recovery", a progress bar indicated that old bios was erased; after that another progress bar indicating the flash process stopped after 2 seconds (1cm); “flash error” message appeared; the “utility” tried again to erase BIOS (first progress bar again); “erase error” message has appeared. “The POST will continue” or something like that is displayed, and all is blocked and disabled. After a long time of useless praying I removed the battery from my laptop and go ahead again (power on). And everything is happening identical (again and again) from the mark above (***).

It was somewhat strange, especially since, after rebooting I could access BIOS. Without hard disk the laptop shut down in 3 seconds.

I analyzed the content of hard drive and discovered a new file, named T20.BIN (1M - probably with the BIOS image) in C:\.

I think that when laptop is powered on he does not find the BIOS, it search for BIOS image file in the root of active partition on hard drive, load it (T20.BIN), starts "BIOS ROM Utility V1.16 Crisis Recovery" and you know the rest …

After loading the BIOS from the HDD and start rewriting, everything freeze and I can not do anything: "BIOS ROM Utility V1.16 Crisis Recovery" occurs during POST and POST freeze before ending, so I can’t reach the point where I can boot.

Meanwhile I changed the T20.BIN file with other bios (given by Toshiba Site for Vista) and everything happens the same (with the difference that now the BIOS loaded from hard drive is showing another version number).

I know the some laptops have a service procedure so you can rewrite BIOS after crush. I tried different methods indicated on forums for others L series but nothing works.
I couldn’t find the Maintenance Manual for L40.
I found anyway Maintenance Manuals for others Toshiba models where are presented service procedures for rewriting BIOS (generally using a floppy disk).
Didn’t work for L40, USB floppy drive is dead before entering BIOS and after that is too late for me.

Any idea? (Not ASP. I mean good ideas.)
Does anyone have L40 Maintenance manual or only BIOS Rewrite Procedures?
:\
 
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