1030 g3 battery not charging

[motanya]

What is the possible solution for hp x360 1030 g3 that detects battery but does not increase, I have tried with different batteries that i know work, I have also replaced the charging ic but that does not solve the issue.

[mon2]

Re: 1030 g3 battery not charging

Check the voltage to ground of each pin on the battery connector.

The SMBUS SCL / SDA lines often contain a TVS ESD diode that can get zapped by static transients. This event will then pull down the SMBUS line(s) and cause the balance of the battery functions to fail.

Post the measurements.

[motanya]

Re: 1030 g3 battery not charging

Pins RED 0V
Pin yellow 0V
Pin Grey 2.9V~3.1V*
Pin White 0v~1.1V*
Pin Green 0V
Black 0


*They have the 1st voltage when battery is connected and 2nd one when battery is disconnected

[mon2]

Re: 1030 g3 battery not charging

Pin yellow 0V
Pin Grey 2.9V~3.1V*

Remove all power. Remove the battery.

Meter in resistance mode.

Measure the resistance to ground of the contact pin that mates with the yellow wire on the battery. Do not attach the battery - just interested in the resistance to ground of the battery connector on the logic board.

What is the resistance reading ?

Then repeat for the GREY wire contact for a comparison.

What is the resistance reading ?

Also consider to test in DIODE mode. Meter in DIODE mode.

Red meter probe to ground, yes RED probe.

Black meter probe to the YELLOW wire contact on the logic board. What is the diode reading ?

For comparison, repeat to test the GREY wire contact on the logic board. What is the diode reading ?

[motanya]

Re: 1030 g3 battery not charging

Remove all power. Remove the battery.

Meter in resistance mode.

Measure the resistance to ground of the contact pin that mates with the yellow wire on the battery. Do not attach the battery - just interested in the resistance to ground of the battery connector on the logic board.

What is the resistance reading ?

Then repeat for the GREY wire contact for a comparison.

What is the resistance reading ?

Also consider to test in DIODE mode. Meter in DIODE mode.

Red meter probe to ground, yes RED probe.

Black meter probe to the YELLOW wire contact on the logic board. What is the diode reading ?

For comparison, repeat to test the GREY wire contact on the logic board. What is the diode reading ?

Thanks mon2 and sorry for not replying early, it was night here so i left my workstation.
Anyway I have done the measurements, I am not sure if they are correct, I have attached photo evidence in case there is something I need to change let me know.

Resistance to ground for the Pin that mates with the yellow is 103.9k ohm
Grey 1.9M Ohm

In diode mode both have no readings the meter remains unchanged

[motanya]

Re: 1030 g3 battery not charging

Have you checked it?

[mon2]

Re: 1030 g3 battery not charging

Check the same resistance to ground readings for the WHITE and then the GREEN wire contacts.

2 of these wires will be the SCL & SDA lines that are of interest to us. Checking if they are shorted to ground or not.

[motanya]

Re: 1030 g3 battery not charging

Check the same resistance to ground readings for the WHITE and then the GREEN wire contacts.

2 of these wires will be the SCL & SDA lines that are of interest to us. Checking if they are shorted to ground or not.

Hello mon2, this I never solved the mystery with this laptop. The SCL and SDA lines both have a 0.26voltage when the battery is removed. I have tried to replace the diodes from a working motherboard literally almost everything, now the ones I replace from this mb work perfectly on the other mb. I do not understand why the two lines have 0.26v instead of 3.3v has anyone ever encountered this and what was the solution or what else should I check

[mon2]

You will have this low voltage if the mandatory pull-up resistor or the actual pull-up resistor voltage is missing. Be sure to trace these I2C (SMBUS) lines and locate the pull-up resistors. Confirm they are present on the board and not missing or corroded. Next, confirm the voltage on the other side of these 2 resistors which should be ~3v3 on most boards unless it is a low voltage rail by design. Often then it will be ~1v8 and voltage level shifters are used before used by the PCH which acts like the SMBUS bus master. The battery is a SMBUS slave device with its own address for communication.

[motanya]

Thank you will check everything and update