inspiron 17r 5721

[shabis]

Hi . my laptop is completely dead . Power light on and nothing happened  After searching the web i decide to flash my bios .
i download bios file from dell site 5721A14 and try to extract hdr and rom files with command prompt  and always get an error :
: invalid winflash parameters ".  Ïs there a way to get these file extracted?
 thanks

[DeathBringer]

Try to use UniExtract