As far as I can see corectly its position on the MB's PCB is Q93, but this is not important any more.
Its function is a buffer drive between na PWM and the CPU-FAN. uac.co.jp/news/daily/040305/p4p800se_l2.jpg
Now I should buy a suitable match and replace the poor remains of the old AP3310H.
It is P-channel AP3310H with marking "3310H" made by "Advanced Power Electronics Corp."
a-power.com.tw/pdf/Datasheet/AP3310H.pdf
As far as I can see corectly its position on the MB's PCB is Q93, but this is not important any more.
Its function is a buffer drive between na PWM and the CPU-FAN.
uac.co.jp/news/daily/040305/p4p800se_l2.jpg
Now I should buy a suitable match and replace the poor remains of the old AP3310H.
Edit: Был успешно заменён на IRFR5305 irf.com/product-info/datasheets/data/irfr5305.pdf. Все работает в полном порядке.