hye need forumer help. i got 1 compaq v3000 intel model. when power on with battery the display come. but when pull out the battery and put adapter charger laptop can power on but no display. anyone had face with this problem too? already chekck u4 mosfet and u10 mosfet. pin 123 got 19v but pin 5678 no volt.
compaq can power on batttery but not by charger
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Re: compaq can power on batttery but not by charger
ok i will post results here Thanks dj . As i know from dj _ricoh said pin 1 for ACIN pin 3 for DCIN and pin 6 for ACOK. ACIN and DCIN from adapter input . and ACOK from LDO,what means LDO ? and . what are connection do here with display ? seem like shorted cap in that area ?when put adapter no display but ok with battery.Comment
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Re: compaq can power on batttery but not by charger
LDO provide 3.3V for the chip it self in order to set REF voltage and gives voltage to mosfet that charge the battery.
results first so we can see what is going onJust cook it! It's already broken.Comment
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Re: compaq can power on batttery but not by charger
i got 19.12v on pin1 , 3.08 on pin 3 and 3.27v on pin 6. when power on state pin1 drop to 18.77v , 3.08 on pin3 then 3.27v on pin 6.
more info i measure volt on U4 mosfet pin 5678 no volt but present volt on gate , 1,2,3 all got 19v.
u10 also same volt as U4 no volt on source.
put battery+adapter back also got same reading.Comment
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