Asus X551c Dead?

Hi all,

I replaced today my battery of my laptop. After I put the battery back into his place I started the laptop by shorting the contacts of the connector on the mb.

I plugged in the cable and the laptop started, for 3 seconds. The laptop is now dead. No lights if I push the power buttton or plugging the cable.

Did the fuse broke or something?

Thank you

 

Probably not fuse but doing power up that way can cause damage to laptop. Also laptop must be quite "open model" to do that

 

What do you mean by open model?

 

You had to open that laptop to get contact with motherboard, right? It's possible that motherboard caught some static electricity and damaged.

Also as it's required to basically tear laptop apart when replacing battery, it's possible you did not assemble it back perfectly. For example power button may not physically make proper contact with start pins.

Those slim type notebooks are painful to open and assemble again.

 

But I placed the battery and when plugging in the dc, there is also no charging light.

 

OK, try to start without battery just with DC.

 

It does nothing, no light, no fan spin. But when I use a multimeter to read the dc jack, I got 19v, so that isn't broking

 

Here is the connector for the power button

 

In that case it's not battery problem. So something with laptop power supply side is probably broken. It's quite common chip that controlling power from DC jack brokes down and after that laptop cannot get power or load battery. Since you have multimeter, you probably can measure how much voltage (if that exists) power chip next to DC plug can provide to motherboard. Don't know for that exact model but many laptops have that kind of chip and it should provide 19V at least from one pin when plugged in.

 

Thank you. I measured the chip near the DC and I got 19v in several pins. What does this mean? It is strange that the laptop is dead, like the ac adapter is broken or something like that.

 

I saw on a forum:

Be very careful about probing the power button connector or turning it on with tweezers - there is a 19v line right next to pin 1 (3.3v). You don't want to touch those two points together by any chance.

if you touch the 3.3 with the 19 volts pin ass well , then you fryed the on off switch insyde SIO chip , first thing is replace SIO

 

It just mean that chip should work (or at least provide power) so problem is somewhere else.

Well, that's good explanation of what might have happened.

 

The problem is that I don't know where this chip or something else is...

 

If you can find motherboard layout on chip level, then you perhaps can do some fix. Without it repairing is quite hopeless.

 

Do you mean a schematic for the motherboards?

 

Yes.

 

I found a .fz file but I dont know how to open it.
http://s000.tinyupload.com/?file_id=08903424944533474603

 

Try http://fritzing.org/home/

 

Nope, it is not opening...

 

Cannot find any other program that should open it. Perhaps that file is corrupted.