Asus X751LD no Power

[Trailoard]

I have no Power no LED´s

There are 19V before first fet but no voltage (swapping between 100mV and 200mV) on Gate.
Checked the two dc-in fets with multimeter from Drain to Source and it seems all ok.

But the fet on the second picture has 30 Kohms in one way and 250 kohms in the other... Is this one shorted?

How can I check the capacitor marked in picture?

On bq24735 I have 18V? on VCC, 6V on REGN and 2.6V on ACDET.

Got 0.4 V on several pins for battery?

Or is it some other problem?

[meritosari]

Re: Asus X751LD no Power

The BV and link HD image

https://drive.google.com/file/d/0B2s...ew?usp=sharing

[piernov]

Re: Asus X751LD no Power

The capacitor must not be shorted and that's all.
Also check gate-drain and gate-source on both MOSFET (next to the circled capacitor).
The MOSFET circled in the second picture is for working on battery voltage, doesn't matter here, several kiloohms is not a short.

On the other hand we can clearly see a burnt mark on resistor marked 100 right next to the circled capacitor. Check the resistance across its leads, but I guess it will need to be replaced.

[Trailoard]

Re: Asus X751LD no Power

Yes, you are right... The resistor need to be replaced. I measured 2 kohms not 10 ohms.

I also tested gate-drain and gate-source on both Mosfets... I´m not sure about the second one... I will replace it as soon as possible and post the results here.

Thanks first for the quick reply

[booba]

Re: Asus X751LD no Power

Check that 10 ohm resistor, it suplies the chrg chip, resistor its blown due a short after it

[Sephir0th]

Re: Asus X751LD no Power

.

[pascalou95370]

Re: Asus X751LD no Power

Hello,
On ASUS X751LD the fan does not spin?.
I'm looking for the fan power diagram.
thank you

[mon2]

Re: Asus X751LD no Power

@pascalou95370, you should start a fresh thread for assistance.

You have no power to this Asus ?

[pascalou95370]

Re: Asus X751LD no Power

hello,
Thank you for your answer, I don't know on which post I should ask my questions?.
I am French and I have a little trouble with the English language.
The ASUS pc works great, but the fan doesn't spin
the computer heats up.
I recall that fan works on another pc.

[mon2]

Re: Asus X751LD no Power

It will be easier for future readers to follow if this case is a fresh thread.

Goto your bios, can you read the cpu temperature?

If the fan is not defective but still off, then the temperature sensor may be defective or unable to measure the cpu temperature.

[pascalou95370]

Re: Asus X751LD no Power

Hello,
I want to go to the right topic, but I don't understand English.
for the temperature sensor, I don't know where it is, that's why I'm looking for the diagram.
this would allow me to follow the power supply of the fan and its temperature sensor.

[pascalou95370]

Asus x751ld

Hello,
I am French and use tranlate to make myself understood.
Fan not spinning?
It is functional on another PC.
I'm looking for the circuit diagram that powers this fan.
If anyone could give me some information on this error.
The pc works, but heats up and the video becomes unreadable.
thank you.
pascal

[mon2]

Re: Asus X751LD no Power

What is the cpu temperature in the bios?