P5WS0 (la-6901p) no cpu core voltage

scobay

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

scobay писал(а):

found +5vs to be 2.3v (bad cap)

Look to R372, must be 19V.

scobay

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

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

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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P5WS0 (la-6901p) no cpu core voltage

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