HP Probook 430 G2 PCB: ZPM30 LA-B171P REV. 1.0 Brak obrazu

Po podłączeniu zasilacza albo baterii w laptop od razu zapala się kontrolka od „power”, jak by się włączał automatycznie, a kontrolka od gniazda zasilania mruga, ma jasny kolor.
Brak obrazu, wentylator stoi, CPU nie grzeje się.

Pobór 0,02A

PL101 2 MOhm
PL102 6 MOhm
PL302 38 kOhm
PL303 7k Ohm
PLH2 1 Ohm
PLZ2 50 Ohm
PLM2 270 Ohm

PL101 19.5V
PL102 2.4V
PL302 5 V
PL303 3.4V
PLH2 0V
PLZ2 0V
PLM2 0V

Po rozlutowaniu zworki PJH1

PLH2 34 kOhm

if PLZ2 is +1.05VS, than CPU is most probably faulty...you can try "shortcircuit test" on this line and check/verify for faulty component.

...sorry, PLH2 not PLZ2

wof napisał(a):if PLZ2 is +1.05VS

The 1.05V coil is PLH2.
Perform a short circuit test as suggested on PLH2. Yes, the APU hybrid is unfortunately damaged almost for sure.

matic napisał(a):The 1.05V coil is PLH2.
Perform a short circuit test as suggested on PLH2. Yes, the APU hybrid is unfortunately damaged almost for sure.

Wlutowałem się w PLH2.
Pobiera 1V i skacze między 600mA do 1A, ale nic nie czuje, żeby się grzało.

john47 napisał(a):Wlutowałem się w PLH2.

In this case the coil PLH2 must be removed from the board and the jumper PJH1 must be closed.
Leave the board under the test for some time (~15 minutes) and check which component is warm. Pay special attention to the small core (PCH part) of the APU hybrid.

matic napisał(a):In this case the coil PLH2 must be removed from the board and the jumper PJH1 must be closed.
Leave the board under the test for some time (~15 minutes) and check which component is warm. Pay special attention to the small core (PCH part) of the APU hybrid.

Pobór przy 1V - 2.4A nic się nie grzej, ręką nic nie wyczuwam, a nie mam termowizji.

john47 napisał(a):Pobór przy 1V - 2.4A

Measure the voltage at the end of the test wires (at the point where they are soldered to the board) during a short circuit test at 2.4A.

matic napisał(a):Measure the voltage at the end of the test wires (at the point where they are soldered to the board) during a short circuit test at 2.4A.

0.03V

Your test wires are too thin or bad quality.
Use a quality copper wires with a cross section of at least 1mm2.

matic napisał(a):Your test wires are too thin or bad quality.
Use a quality copper wires with a cross section of at least 1mm2.

Skróciłem i wymieniłem na 1,5mm.
Obecnie pobór 0,15V i 5A więcej nie mam, nic się nie grzeje.

Post a clear picture of PLH2 area of the board with a nearby surroundings.