Asus Zenbook ux31a how to know which cap?

[Expl332]

Hello i've posted before under some old thread but anyway i got new led screen for ux31 and it wont work even when i shine into it with a flashlight i don't see anything

the thing is when i was cleaning it with wet paper towel the little wet bit got inside of mini dp port and after an hour or so the display started to get strange white spots which then all of a sudden died on me... after that i was checking for problems with multi-meter and accidentally shorted the lvds display connector the sort created a bright spark..

cap burned
https://imgur.com/a/zhDXnew

i even try to replace it with almost same looking cap but it still won't work
https://imgur.com/a/ccbI0gG

Does somebody knows where i can buy the right cap for this motherboard?And is it this cap which is why i cant get my new screen to work or is it the lvds connector or maybe something else ?


http://imgur.com/a/J6YOMvC

Yellow mark the dp port where the bits of wet paper towel were found(I've already removed the whole dp unit it)
Purple mark is the display cable connector where i've made the second short,
Red mark is the blown smd capacitor which is located on the other side.



Thank you

[piernov]

Re: Asus Zenbook ux31a how to know which cap?

If the cap got burnt like that due to a short circuit there's probably more to the issue.
The cap on the second picture isn't soldered properly.
UX31A2 schematics is available, and I think the boardview as well.

[jasko_jacker]

Re: Asus Zenbook ux31a how to know which cap?

Disconnect lcd and it's flat, check if the laptop visualize properly with external display .
The lcd you have it is the same of the original?

[Expl332]

Re: Asus Zenbook ux31a how to know which cap?

If the cap got burnt like that due to a short circuit there's probably more to the issue.
The cap on the second picture isn't soldered properly.
UX31A2 schematics is available, and I think the boardview as well.

FERRITE BEAD (0603) 120OHM/2A
MAXECHO/ACMS160808A121 2A

Is the burnt cap

So i've ordered
10 X Ferrite Bead, 120 ohm, 0603 [1608 Metric], BLM18E Series, 2 A, 0.04 ohm, ±
Detailed
FERRITE BEAD 0.04OHM 2A 0603
Impedance @ 100MHz : 120ohm
Ferrite Case Style : 0603 [1608 Metric]
Product Range : BLM18E Series
DC Current Rating : 2A
DC Resistance Max : 0.04ohm
Impedance Tolerance : ± 25%
Automotive Qualification Standard : -
SVHC : No SVHC (17-Dec-2015)
Core Material : Ferrite
Ferrite Mounting : SMD
Operating Temperature Max : +125°C
Operating Temperature Min : -55°C
Packaging : Cut Tape
Resistance : 0.04ohm

Big thank you piernov for the boardview info
It looks like that this cap is for AC_BAT_SYS_INV_CON
and is connected to lvds connector on 4 pins
just hope i didn't mess something up even more with that cap i put on there from other laptop

[Expl332]

Re: Asus Zenbook ux31a how to know which cap?

Disconnect lcd and it's flat, check if the laptop visualize properly with external display .
The lcd you have it is the same of the original?

The pc works trough micro hdmi normally

There is no visible damage on the old screen neither on lvds connector