Dell Inspirion 3558 MB: IRIS HSW BDW 14216-1 REV:A00 zwarcie

Witam,
Model: Dell Inspirion 3558
Płyta: IRIS HSW BDW 14216-1 REV:A00
KBC: NOVOTON NPCE285PA0DX
BIOS : MIC 25L6473E

Laptop ze zwarciem. Po podłączeniu zasilacza przygasa dioda. Z pomiarów wynika że na cewce PL4902 = 0 Ohm.
Wylutowawłem cewkę PL4902 i zwarcie jest od strony 1D35V_PWR. Ściągnąłem też klucze PU4903, PU4902 i PC4920. Dalej zwarcie.
Przy próbie zwarciowej ustawionej na 1V pobiera 1A i nic się nie grzeje.

Mogę prosić o sugestie?

Hello!

Repeat the short circuit test at the voltage limit 1,3V. Wait about 10 minutes to the temperature stabilize and then check which component is slightly warm. Pay special attention to the small core of the APU hybrid.

matic написав:Repeat the short circuit test at the voltage limit 1,3V. Wait about 10 minutes to the temperature stabilize and then check which component is slightly warm. Pay special attention to the small core of the APU hybrid.

The CPU is warm.

Bezel018 написав:The CPU is warm.

So the APU hybrid is definitely damaged and needs to be replaced.
The transistor PU4902 is probably also damaged.

If you decide to replace the APU, remove the old one from the board first and remeasure the resistance to ground on coil PL4902.

I don't want replace the APU hybrid. To high costs for me.

Thanks for help!