G751jy led backlight problem/mobo

Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Hello everyone.

The problem is as follows:

I took apart my G751JY down to the last bolt, however when I put it back together the screen was not working. The external monitor works but the LCD screen remains black. Tried holding the power button for 20 - 45 - 60 seconds, does not help. Tried unplugging/plugging in the screen - does not help. Took apart the screen nothing special there. Took apart the laptop again, and on the bottom of the mobo found out that a certain part was fried (see pictures)
The screen is black/does not show signs of life, however when pointed at with bright light I can pick up details.
What caused the problem? (my thought) -When taking the laptop apart i disconnected screen prior to disconnecting the battery (since the battery is internal I unhooked the LED screen connector first and only then saw the battery connector - my mistake I know).

The only problem is the LCD backlight, everything else works great - GPU,CPU, RAM, charging etc. Just the backlight does not.
I need your help to figuring out what kind of part is this and if it is possible to fix it? I know its hard to pick it out from pictures but maybe someone has seen this before. Any ideas will help! Thanks!
 

Attachments

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
Can you see anything written on top of the cracked component ?

Try to find another component that looks identical and tell us if there's anything written on it or on the motherboard near it.
 

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Unfortunately, there were no markings on it. And tried to look for similar components but couldn't really find anything similar. Most of components didn't have any markings either. And the are almost no markings on the motherboard as well :mad:
 

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
Anything written on the other side of the board opposite the cracked component ?
 

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Not really, it is just populated by some components as you can see from the solder spots next to the cracked component.
 

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
Ok. The cracked component could be a resistor, capacitor, diode or possibly something else.

Unless you can identify it I think you will have to take it to a shop/tech to get it fixed because getting it wrong could do more damage.
 

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Thanks again for your time, I have been told to check out eevblog to seek help. I'll let you know what i find out. It definitely looks like one of those ceramic capacitors, but I have no idea how it works since I have minimum knowledge in this field.
 

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
eevblog looks like an interesting website, I hope their forum can help you. Please let us know how you get on.
 

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Received couple different opinions from very experienced technicians and they say it is most likely an inductor/choke. This was told by people from different countries and different forums. Thanks again.
 

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
That makes sense, a choke is basically just a coil of wire and if it's cracked it won't be letting any current flow through it. If you could find out what value it should be it would be relatively easy to solder a new one on top of the old. You could risk just joining the 2 ends of the cracked one together to see if the screen lights up but there's a chance that could damage other components. This is assuming that 'choke' is the only damaged component now of course.
 

DonDeKuch

Thread Starter
Joined
Feb 24, 2015
Messages
6
Yeah, I wouldn't want to take unnecessary risk here :). Especially when everything else works. So currently i am at the state where i am not sure if there is anything else damaged. But I don't really see why it would be, plus I did not see any other damaged components. What else could have been damaged shorted in this case?

Since ASUS does not share its manuals, we found a manual of a different laptop but same size LED screen and the technician found what could this part be (google): HCB1608KV-300T30 . Do you agree? any other ideas?
 

managed

Allan
Moderator
Joined
May 24, 2003
Messages
15,069
I googled that part info and I agree it could be the correct component. There's no way I can be sure though. I mentioned that other components could also be damaged but I don't know how likely that is just that it's possible.

I think you have 2 choices, take a chance on fitting that component or use an external monitor with the laptop.
 
Status
This thread has been Locked and is not open to further replies. Please start a New Thread if you're having a similar issue. View our Welcome Guide to learn how to use this site.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

As Seen On
As Seen On...

Welcome to Tech Support Guy!

Are you looking for the solution to your computer problem? Join our site today to ask your question. This site is completely free -- paid for by advertisers and donations.

If you're not already familiar with forums, watch our Welcome Guide to get started.

Join over 807,865 other people just like you!

Latest posts

Top