17841-1

hello i have a dell inspiron with the following motherboard Vegas/Turis MLK KBL -R 17841-1 my problem is that fan is not working even a new fan does not work. when i measure with the multimeter i have 2.645V on the possitive on the fan and the fan is 5V is this bios problem or hardware?any ideas?

Vegas/Turis MLK KBL -R 17841-1 BIOS Inspiron 14 3476 Vostro 3478 3578 Inspiron 3476 3576 clear me 17841-1.bin Dell 14-3478 17841-1 Schematics boardview Dell 3576 - Vegas-Turis MLK KBL-R - 17841-1 Boardview (.CAD).cad 17841-1 TOP.pdf 17841-1 BOTTOM.pdf VEGAS-TURIS-MLK-KBL-R_WX2RR_Rev...