msi netbook u135dx battery not charging

[String2016]

Hi everyone I need help on this netbook msi u135dx the problem is battery stuck on 30% and it shows charging but only 30% and also cannot turn on on battery but works fine with charger. anyone please help

[meritosari]

Re: msi netbook u135dx battery not charging

Symptom like the First mosfet after DC jack have shorted ( Drain to Source), so power source from the adapter didn't verified and charger IC didn't working properly.

[String2016]

Re: msi netbook u135dx battery not charging

There is a mosfet after the dc in mosfet is AO4932 here is the reading charger only pin 1=19v pin 2=19v pin3=ov pin4=ov pin 5 to 8=0v but battery only inserted all pins have ov but battery and charger inserted pin1 and 2 =19v pin3 and 4 0v pin 5 to 8=12v. Also baterry and charger inserted only pin 3 have resistance.any advise please help

[String2016]

Re: msi netbook u135dx battery not charging

Anyone please help

[meritosari]

Re: msi netbook u135dx battery not charging

Do you have the schematic?
I think this is MSI wind U100

Try open the black tape near DC jack, there should be FET Q40 AO4413
Measure it in diode mode or ohm mode ( Don't apply power when you measure it in diode mode or ohm mode)

Link HD image:https://drive.google.com/folderview?...2s&usp=sharing

[String2016]

Re: msi netbook u135dx battery not charging

Thank you for the response i dont have schematic for this I checked mosfet AO4413 behind dc in its PQ9 and put multimeter to 200 ohms here is the reading pin 1 to 3 = 41.2 ohms pin 4=102.9ohms and pin 5 to 8 have 24 ohms.any advise and help please

[String2016]

Re: msi netbook u135dx battery not charging

Anyone please help

[String2016]

Re: msi netbook u135dx battery not charging

anyone please help

[String2016]

Re: msi netbook u135dx battery not charging

Anyone please help still cannor figured out this problem

[String2016]

Re: msi netbook u135dx battery not charging

Anyone please help on this please

[mielta]

Re: msi netbook u135dx battery not charging

Hi
I think here is the schematic
The password for the pdf is ERC

i hope it helps

[String2016]

Re: msi netbook u135dx battery not charging

thanks for the schematics ill check pq9 above post #9 is the reading anyone please help me what could it be the problem cannot turn on battery but works fine on charger battery charging but stuck on 30percent can anyone help me on this please

[meritosari]

Re: msi netbook u135dx battery not charging

https://www.badcaps.net/forum/showpo...4&postcount=19

[String2016]

Re: msi netbook u135dx battery not charging

thanks for the response guys i measured again the mosfet AO4413 multimeter set to 200ohms

pin1 S1 black probe to pin 4 G1 red probe = 199.5 ohms
pin1 S1 black probe to pin5 D1 red probe = reading flashing
pin 4 G1 black probe to pin 5 D1 red probe = 193.6 ohms
pin 2 S2 black probe to pin 4 G1 red probe = 197 ohms
pin 2 S2 black probe to pin 5 D1 red probe = reading flashing
pin 4 G1 black probe to pin 6 D2 red probe = 190.3 ohms
pin 3 S3 black probe to pin 4 G1 red probe = 196.6 ohms
pin 3 S3 black probe to pin 5 D1 red probe = reading flashing
pin 4 G1 black probe to pin 7 D3 red probe = 188.6 ohms
pin 4 G1 black probe to pin 8 D4 red probe = 193.5 ohms

in seems that there is short on drain to source for the mosfet
and also notice 1 ceramip caps at back on dc have no resistance because ohms I Have attached the image. please anyone help on this please

[String2016]

Re: msi netbook u135dx battery not charging

anyone please help

[String2016]

Re: msi netbook u135dx battery not charging

any advise and help on this please

[String2016]

Re: msi netbook u135dx battery not charging

any help on this please ill tried to change the mosfet AO4413 but i don't have the spare can anyone advise what compatible with this please

[mielta]

Re: msi netbook u135dx battery not charging

Hi
You must look at side 21 there is Power select.
check the voltage within battery

[String2016]

Re: msi netbook u135dx battery not charging

thank for the response mielta what do you mean side 21?

[mielta]

Re: msi netbook u135dx battery not charging

Hi
I mean in the schematic at 21