case study: acer aspire v5-431,Wistron Petra UMA Rev: 1 no power problems solve
ctlab IN code:
date:20/10/2016 DELIVER TIME:
problems:no power
working procedure:mb open from casing
pcb code: Wistron Petra UMA Rev: 1
mb is not fresh because previously mb try to solv
custumer is shop holder who is laptop service provider.
service level fault:5v and 3v ic pin no 1 and 6 are only 1 volt but its will be 5volt.
CHANGE UPPER AND LOWER MOSFET THEN 1 AND 6 NO PIN ARE 5V NOW.
.......> PRESS POWER BUTTON THEN GENERATE 3D3V_PWR AND 5V_PWR.
COMMENTS: LAPTOP IS NOW OK. THANK YOU VERY MUCH.(CTLab)
MOBILE:01922042113
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