Hi
i have a hp 4540s and turn on and immediately turn off in miliesecond.
power jack was a broken, changed and IC charger changed(it burnt).
power jack for few days was a broken and pin 19volt and signal were nude and laptop work but few movment the system would shut down (According to the client)
19 volt present.
5v and 3v stand by present,
3.3 bios ok.
5V_AUX_S5 ok
3D3V_AUX_S5 ok
KBC power :
pin 68 : 3.0 volt
pin 14 : 3.3 v
pin 39 : 1.4 v
and pin 33 ic i/o (kbc) is changing between 2.5-3 volt!
ohm checked inductors:
pl4601 : 540 ohm
pl4701 : 443 ohm
pl4101 : 10 k ohm
pl4102 : 35k-250k changing sometime 43 kohm constant
pl4501 : 31 ohm
pl9201 : 20 ohm
pl4301 : 23 ohm
pl4302 : 23ohm
pl4401 : 32ohm
pl4801 : 60 ohm
charger pin signal on charger is 18 volt but when i plug power jack in motherboard is measure volt this pin , it is 4.4 volt!
tnx
i have a hp 4540s and turn on and immediately turn off in miliesecond.
power jack was a broken, changed and IC charger changed(it burnt).
power jack for few days was a broken and pin 19volt and signal were nude and laptop work but few movment the system would shut down (According to the client)
19 volt present.
5v and 3v stand by present,
3.3 bios ok.
5V_AUX_S5 ok
3D3V_AUX_S5 ok
KBC power :
pin 68 : 3.0 volt
pin 14 : 3.3 v
pin 39 : 1.4 v
and pin 33 ic i/o (kbc) is changing between 2.5-3 volt!
ohm checked inductors:
pl4601 : 540 ohm
pl4701 : 443 ohm
pl4101 : 10 k ohm
pl4102 : 35k-250k changing sometime 43 kohm constant
pl4501 : 31 ohm
pl9201 : 20 ohm
pl4301 : 23 ohm
pl4302 : 23ohm
pl4401 : 32ohm
pl4801 : 60 ohm
charger pin signal on charger is 18 volt but when i plug power jack in motherboard is measure volt this pin , it is 4.4 volt!
tnx
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