Dell inspiron 3593 Charging Fault

[Indunil555]

Dell inspiron 3593
FDI55 LA - J081P Motherboard
Rev 1.0

Laptop Battery not charging.
Laptop work only battery power.
Adaptor connected ( 19v DC Jack) Motherboard main voltages ok but no display and not charging.
One time white led and 3 time orange led blinking continue.
Charged battery install after laptop power on and display ok.

What is the problem ?
How to fix it ?

[mon2]

Re: Dell inspiron 3593 Charging Fault

1) review the charger IC @ PUB01.

2) measure the voltage on each pin of the 2 x DCin mosfets (PQB11 & PQB12)

source (1-2-3)
gate (4)
drain (5-6-7-8)

Post each measurement.

Repeat for each mosfet.

If all is well, the GATE voltage has to be high enough to enable the above 2 x mosfets to pass the DCin voltage to power the lower board.

3) if the voltage is not high enough, then with great care, measure the voltage on each pin of the charger IC. Do so with caution to not short any of the pins which can cause other damage to the charger IC and then will have to be replaced.

Post each voltage measurement in a table with each pin.

As per the flood of other posts on this forum - the issue is often with the DCin mosfets - see the detailed sticky from @Piernov above for more information.

[Indunil555]

Re: Dell inspiron 3593 Charging Fault

pqb11
s-d 4.1mΩ
s-g 3.6mΩ
d-g 8.7mΩ

pqb12
s-d 2.5mΩ
s-g 3.6mΩ
d-g 8.4mΩ

[mon2]

Re: Dell inspiron 3593 Charging Fault

1) resistance is fine.

2) proceed to test the voltage measurements noted in the post.

[mcplslg123]

Re: Dell inspiron 3593 Charging Fault

Voltage on SDA/SCL present on battery connector??