what did you do ???Any idea please , what could be the reason that the 3v LDO becomes 5v and the 3v always voltage becomes 5v, I changed the IC didn't help
"-I mean the LDO should have been 3v but it is reading 5v" its impossible .
take pic and mark all voltage on it .
tnx for perfect explain sir . ok . plz remove pr329 and volt check both side of this resistor . if output of 3v ldo from ic is 5v : ic have problem , if not : one component have problem and 5vsb connected to 3v ldo voltage . check it and reply.1.There is an LDO output from IC PU3002 ,or at pin number 6 or at capacitor PC3045 , that should have be 3v but what I am getting is 5V
2.As you said ,when I remove PL3002 and connect adapter there is no out put at the output of IC PU3002 it is 0V but the LDO is still 5V
3.Beyond the abnormal reading of the board ,when I press the button it starts and the fan spinning for a while ( for a second or two) then off, during this time all voltages except VCORE voltage give a reading for a moment then off
4. In off condition only 1.0v (1V-SRC) at PL6 reading 1V
Am I clear sir ?