CHARGING ISSUE :
Pu301 charging ic ISL6251 AHAZ , CSIN 20 OHMS, CSIP 0 OHMS, PQ313 4456, PQ310 4456, PQ302 4433 , CSON 20 OHMS, CSOP 20 OHMS, PR310 FSTCHG 0 OHMS , io controller KB930QF A1 all component faulty after change m/b on properly but no charging flash bios no charging , check all resistance and transistors with the help of new board but not charging everything look ok. FSTCHG 3.3V OK . FINALY AGAIN CHANGE ISL6251 CHARGING OK EVERYTHING WORKING FINE NEW IC ISL 6251 FAULTY .