Hi, I try to repair a water damaged Asus UX303LN, there wouldn`t charge battery. The problem was a damaged mosfet...

Where did you purchase the mosfets? Aliexpress, I know ;o) but fakes are every where even at mouser, but until now all have been working from ali... Maybe your mosfets name are different, but I doubt. No physical damage to them, but the ux303ln was water damaged and it was obviously around the mosfets. The only problem I have now, is that a tiny smd capacitor between the mosfets was shorted and destroyed and I can`t find a schematic there shows its value...but maybe I should make a another thread in here with that problem and hope somebody know ;o) The ux303ln works fine with charger, but wouldn`t charge the battery and these qm3024m are in the battery charging area... I have repair another Asus laptops, also deaths ones and often the problem have been the first mosfet after the jack in dc line. The culprit is, that they often is placed on the backside of the motherboard... Mine mosfet was shorted inside(connection from drain to source) and the 2 black mosfets are placed here(the red areas are the 2...

I know its a little bit to late, but if you still have the board and want a spare ;0) I will think the problem can be one or both mosfets (the square ones with 8 small pins) at your first picture) There are 2 mosfets together and I will think one or both of them doesn’t work proberly. I have a ux303ln here and the first mosfet qm3024m in the dc-in way after the power jack was shorted.

Hi, I have a ux303ln and has just replaced the first mosfet qm3024m(shorted) in the dc-in Line after the power Jack. There are 2 mosfets togethers and I will think one or both of them doesn’t work proberly.