Dell Latitude 5490 (LA-F401P) Liquid Damage

[m3g4tr0n]

I have Dell Latitude 5490 that got liquid damaged.

when pressing the power button the led lights up for 3 secs then powers off. The fans not spinning.

I have attached a picture with some voltage measurements.




I can't find any schematics for this board.

-----------------
DDM70 LA-F401P
Rev: 2.0 (A01)
2018-05-03
-----------------

thanks for any help

[jasko_jacker]

Re: Dell Latitude 5490 (LA-F401P) Liquid Damage

Probably there is a short somewhere, the schematic is not avalaible .
If the liquid is not under a bga it's possible to solve the issue, check with
magnifier every component, I do not recommend powering the card before being sure that you have searched for any oxydation.
often, small components such as resistors may seem ok but with strong magnification we see that they need to be replaced

[datodati962@gmail.com]

Re: Dell Latitude 5490 (LA-F401P) Liquid Damage

Hi,do you solve this problem,i have the same issue with this board,please if you have find where is the problem please share!

[SMDFlea]

Re: Dell Latitude 5490 (LA-F401P) Liquid Damage

Hi,do you solve this problem,i have the same issue with this board,please if you have find where is the problem please share!

schematic and boardview - https://www.badcaps.net/forum/showthread.php?t=78328

[rablk]

Re: Dell Latitude 5490 (LA-F401P) Liquid Damage

Hi guys, did you solve the problem?, i have the same issue too with this board after about 3 or 4 sec and it turns off , i've tested almost every component using a boardview et schematic but no luck to locate the problem exactly please guys share if you've solved it