Asus TP412UA shorted

[zolie]

I would like to ask for help to repair this motherboard. Its shorted. No boardview and schematic. One of the 7466 fet and a resistor (marked in pic) must be faulty. I made some measurements and drew them on the pictures. Thank you for your help!

[zolie]

Asus TP412UA shorted

When I wrote 'to gnd: I'cant' , the multimeter showed nothing.

[Techtiger]

Re: Asus TP412UA shorted

When I wrote 'to gnd: I'cant' , the multimeter showed nothing.

What was the reason you have removed the 2 DC in mosfet ? ( 2nd pic) The readings for the coils are ok sector show always Low resistance

[zolie]

Re: Asus TP412UA shorted

What was the reason you have removed the 2 DC in mosfet ? ( 2nd pic) The readings for the coils are ok sector show always Low resistance

I measured a short circuit on it. I took them down and looked at them one by one. One is open-close, seems good. The other is shorted.

[Techtiger]

Re: Asus TP412UA shorted

I measured a short circuit on it. I took them down and looked at them one by one. One is open-close, seems good. The other is shorted.

Those are in N channel Mosfet what was the reading you got S D G both fets ? The resistor you have a point out is connected to Gate side of one of the Fets

[zolie]

Re: Asus TP412UA shorted

Those are in N channel Mosfet what was the reading you got S D G both fets ? The resistor you have a point out is connected to Gate side of one of the Fets

I didn't write it down when it was on the board. On the left side the resistance was very low. On the right side, the value was much higher.

now
S-D: 0.7ohm
G-S: 274kohm
G.D: 274kohm

[Techtiger]

Re: Asus TP412UA shorted

I didn't write it down when it was on the board. On the left side the resistance was very low. On the right side, the value was much higher.

now
S-D: 0.7ohm
G-S: 274kohm
G.D: 274kohm

Replace the N Fet and replace the resistor with 4k

[zolie]

Re: Asus TP412UA shorted

Replace the N Fet and replace the resistor with 4k

I couldn't find an exact one, just something similar. The original is 7466. Could AON7534 be good instead? The original is AON7466. Could AON7534 be good instead? A few values are lower than the original. And a AON7400A. Here is a Vgs is lower.

[natic]

Re: Asus TP412UA shorted

Could AON7534 be good instead?

Yes, this transistor is a suitable replacement. You can use it.

[Sephir0th]

Re: Asus TP412UA shorted

Such low readings at ACN and ACP means a shorted main power rail in addition. Likely a capacitor

[zolie]

Re: Asus TP412UA shorted (solved)

Thanks for the help of those who tried to help. I also found the capacitor that needed to be replaced. I have attached a picture. The laptop works again

I have one more question: When I measure a high resistance value during measurement, what does that indicate? 2.5Mohm, 20Mohm, 50Mohm.