T460s no power

[mon2]

Ok - believe I finally have the proper schematic that matches the silk screening showing in your posted pics.

See attached. Locate the current sense resistor and carefully measure if you can read ~20v to ground. Ground is the large copper area of the logic board.

Red meter probe on the resistor; black meter probe on the copper area. Meter should be in 30V or higher DC volts scale. This check will confirm that the power path is ok up to here before it reaches the battery charger @ U1 = BQ24780S.

After the above check -> locate the square black chip with a 'BQ' topside marking and then share pics of this region. We need to check if the power path is ok at this charger IC.

[Kad009]

I can only find 0.9
I'm not sure really to look i looked by the coils and keyboard connector
when I plug the charger in I get 0.1v at the Ethernet and power button light and they flash
sorry I'm not so experienced

[dudz622]

check also if 5 volts,3 volts and 1.8 volts are present

[Kad009]

The first picture is the closest fuse to the input jack so I think that it is DC_PWR20_F
It has continuity and 20v both sides
The second two are by the battery connectors they both have continuity but no voltage on either side
I can't seem to find DOCK_DCIN20

[mon2]

Hello and welcome.

There are few fuses onboard - be sure to check if they are blown or not. Remove all power. Meter in diode mode. Short your meter probes and there will be a tone beep. Touch the probes across each of the fuses to confirm if they are ok or are blown.

Do you have a voltage @ VREGIN20 side ? Connect your adapter, meter in DC volts scale of 30v or higher -> measure the voltage to ground on each side of the fuse(s). This will also confirm if the fuse(s) are blown or not. Red meter probe on the fuse; black meter probe to ground (metal shield is ok on the logic board). Proceed with caution since the board is (partially) alive.

[Kad009]

Hi hope everyone is well
This is my first post sorry if I miss anything let me know
I have a T460s which shows no lights and does not power on there is 19.6v on the main power rail
The ethernet port lights flash
I reprogrammed bios no luck
thanks in advance