Tell you how to recover your bricked Dell laptop's BIOS 1. Download BIOS file from Dell: http://ftp.dell.com/bios; 2. Extract HDR file from EXE: xxxxxx.exe -writehdrfile, a file xxxxxx.hdr will be there; 3. Copy xxxxxx.hdr to a formatted floppy disk or U disk (U disk is not fit for D410 / D610); 4. Rename xxxxxx.hdr to the right file name according to below list; 4. Unplug AC adapter and battery from the bricked laptop; 5. Plug USB-Floppy with the disk prepared; 6. Holding press "END" on the keyboard, plug AC Adapter; 7. Then you will find that the battery light is on with red; 8. Release "END", you will find the power light is on and laptop power up; 9. Keep waiting... USB-Floppy will start to work. A continuous reading instead of a short seek action. Keep waiting... 10. Finally, the lapop shutdown or restart. That is all, power on again, you will find it is working properly. Dell Latitude D410 : VENI???.BIN, VENI???.HDR, VENI???.HDC, VEN????.BIN, VEN????.HDR Dell Latitude D420 : CRO????.bin, CRO????.hdr, CRO????.hdc, D420???.bin, D420???.hdr Dell Latitude D430 : CAR????.bin, CAR????.hdr, CAR????.hdc, D430???.bin, D430???.hdr Dell Latitude D610 : AZED???.bin, AZED???.hdr, AZED???.hdc, AZE????.bin, AZE????.hdr Dell Latitude D620 : TRAV???.bin, TRAV???.hdr, TRAV???.hdc, D620???.bin, D620???.hdr Dell Latitude D630 : BRIS???.bin, BRIS???.hdr, BRIS???.hdc, D630???.bin, D630???.hdr Dell Latitude E4300 : LOLA???.bin, LOLA???.hdr, LOLA???.hdc, E4300??.bin, E4300??.hdr Dell Latitude E6400 : RSH????.bin, RSH????.hdr, RSH????.hdc, E6400??.bin, E6400??.hdr Whatever, I can not list here all the models, below is the method to find such filename info: 1. Extract ROM file from EXE: xxxxx.exe -writeromfile; 2. Use a tool decode the xxxxx.rom to xxxxxx.bin; 3. Open xxxxxx.bin by Winhex, Ctrl + F search "hdr", F3 search for the next, it's easy to find the string with ????HDR.?????HDC.?????BIN; That will be the right filename which can be used for the BIOS recovery. Specially thanks to Apokrif 's excellent tools.