Case solved.....thanks all of you for helping. M4700 did fly to recycle bin (hopefully, it will be use for laptop with BIOS recovery). I bought new Asus...."this is the way"
Hi, i have old M4700 (before 2015), was working well (with latest A19 bios drivers), until few days ago......just starts up, fan running, keyboard working, led on (some)......few seconds later (maybe 7/8) shuts down itself, not even showing Dell logo....I was switching RAM (slots), replacing disks, WIFI, replacing (changed) 3V battery......after searching info, my suggestion is corrupt BIOS file, but i did not find any (software) possibility to recover BIOS file on this model. Is it there anyway (prefer software), how to recover BIOS?
M4700 BIOS recovery