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P5WS0 (la-6901p) no cpu core voltage
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scobay [ 01 июл 2017, 04:05 ]
Заголовок сообщения:  P5WS0 (la-6901p) no cpu core voltage
Hi Laptop has black screen initially found +5vs to be 2.3v (bad cap), replaced now fan spins still black screen but still no +CPU_CORE voltage.
PU12
vin is 19v
Vdd is 5v
VR_ON is 3.3v

Any help appreciated
morik59 [ 01 июл 2017, 10:05 ]
Заголовок сообщения:  Re: P5WS0 (la-6901p) no cpu core voltage
scobay писал(а):
found +5vs to be 2.3v (bad cap)

Look to R372, must be 19V.
scobay [ 01 июл 2017, 15:24 ]
Заголовок сообщения:  Re: P5WS0 (la-6901p) no cpu core voltage
Hi +5vs is ok, the problem is there is no +CPU_Core voltage. I changed PU12 ISL95831CRZ-T also but still no out put from it. What else does it need in order to output +CPU_CORE?.
morik59 [ 01 июл 2017, 15:31 ]
Заголовок сообщения:  Re: P5WS0 (la-6901p) no cpu core voltage
Read this http://notebook1.ru/forma1/viewtopic.php?f=231&t=81673
---------- Добавлено спустя 7 минут 45 секунд: ----------
scobay писал(а):
What else does it need in order to output +CPU_CORE?.

1. 1.5VS, 3VS, 5VS - p.43
2. U20
3. U33.
scobay [ 01 июл 2017, 17:01 ]
Заголовок сообщения:  Re: P5WS0 (la-6901p) no cpu core voltage
HI thanks for the info.
+5vs,+3vs, 1.5vs, +3ALW_PCH,+5ALW_PCH all are present.
The SIO U20 was very hot so I changed the KB930QF to a KB3930qf.
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