Hello all, i have problem with this laptop. When i press the power button it will turn on and get picture in the display. But the fan havent turn on. Few second later, the fan star spinning. After 1 minutes, the display and the fan turn off immediatly, the motherboard also turn off. When i check in power inductor near the cpu, it warm. 2 of them. When i check another power inductor nearby ram, thats all cold. Can someone help me or even solve this problem?
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Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
Originally posted by lapfix View PostDo you have schematic , post it with ref of this capacator
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
actually the thermal compound still fresh. i had reset the bios by unplug cmos battery from the socket. i also tried to press novo button when battery, dc adapter and cmos battery unplugged to reset the bios. but the problem still same. what i found is the r36 power inductor feel hot before the laptop turn off, can it be the power inductor faulty? or something in the vrm faulty like power capacitor or mosfet like aon6372.
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
Se attached. Does this BV file match your logic board ? It is what is in my database for the CG412 logic board.
Post pix of the logic board for the parts you are trying to hunt. I think that you are sharing the part markings rather than their location.Attached Files
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
Originally posted by mon2 View PostSe attached. Does this BV file match your logic board ? It is what is in my database for the CG412 logic board.
Post pix of the logic board for the parts you are trying to hunt. I think that you are sharing the part markings rather than their location.
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
Originally posted by mon2 View PostSe attached. Does this BV file match your logic board ? It is what is in my database for the CG412 logic board.
Post pix of the logic board for the parts you are trying to hunt. I think that you are sharing the part markings rather than their location.
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
i have read the io chip or the northbridge datasheet. if the power inductor which have phase1 and phase nb get hot, then it because over current or over voltage that trigger to shutdown. if i have test that the pgood and pgood_nb voltage is down, then how to fix it? how to decide which component is faulty. i just know how to test power transformer PQ and i dont know how to test the power capacitor and power inductor. are test capacitor and power capacitor using same method?
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Re: Turn on 1 minutes and then turn off. Lenovo ideapad 110-14ast
PL1901 should 1.O5V, but only 0.95 V
PL402 just 15 mV
PL401 should 1.35V, but only 0.8 V
PL1003 0.9 volt(the value not stable), it seems should 0.95 volt
PL2402 1 volt (not stable and max is 1.2v), it seems should 1.2 v
what can cause the voltage drop, the voltage from the charger is stable in 20v. the other coil also stable which is 3v and 5v always. can bad capacitor make the voltage drop and not stable?
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