So this is USB-C right to DC In connector, that may explain a few things, just guessing here.

Update:[LIST][*]took out the motherboard for inspection[*]took some pictures, and did not notice anything wrong[*]put all back, and started to review picture and notice something[*]I don't know where to start with measurements, please guide me[*]I don't have tools for this micro-soldering, like hot air station yet, but I am will be able to take measurements[/LIST][ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3488713}[/ATTACH][ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3488714}[/ATTACH]​...

Ok, I will try to provide as much as possible measurements.
To eliminate possibility of faluty DC jack, or/and charger, I did this:

1. Remove DC wire-connector from the board
2. Attach Battery
3. Try to power on

Result:
- Power button lights up
- CPU slowly gets warm
- nothing on a screen, no keyboard backlite, no sound warnings, nothing
- not responding - disconnected battery


[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"image.png","data-attachmentid":3484777}[/ATTACH]...

Additional information:

Original Dell 65W PSU[LIST][*]bought separately, tested on this and other laptop - works[*]was powering this laptop, and other[*]also used 2nd identical PSU on this laptop - worked before[/LIST]Battery[LIST][*]Fully charged in excellent condition, new[*]In bios battery setting was set to AC Primarily[*]Power was connected constantly for the two days before I discovered 'No Power' on Power button push[/LIST]When I plug battery back (charger not connected), and
then push power button[LIST][*]Power Button lights up[*]CPU starts to get warm[*]fan not spinning,...

DC jack tested while disconnected from the board - measured fine....

Can't remove - have no tools yet, but will measure later.

Dell Latitude 5480
REV:A01
PWB:0M6OW
CDM70 LA-E081P
Rev:2.0( A01 )
2017-06-29
​...

Yes, original Dell 65W charger, and I have two identical, and both works, tested with multimeter and charging other Latitude laptops - recognized, and works. No resistance between ID and Plus....

Battery disconnected.

1. Charger connected
- 19V on both, red cables and ID pin
2. Charger disconnected
- red cable and ID pin NOT shorted - OL
3. Removed those cable, DC socket
- wired NOT shorted
4. Checked charger directly
- 19V, ID pin - 0.04V
5. Connected charger to this cable, but NOT
connected to the board
- all fine
6. Put back in a place
- ID pin show 19V

Any idea ? How to proceed, what to check next ?

[ATTACH=JSON]{"data-align":"none","data-size&quo...

Hi, just found this forum of smart people that may help me fix my laptop, and teach me some new thing. Thanks.