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E5410 (Fonseca 14 UMA) No 3.3/5V
https://vlab.su/viewtopic.php?f=41&t=107858		 Страница 1 из 1
R EZ A [ 11 окт 2020, 19:37 ]
Заголовок сообщения:  E5410 (Fonseca 14 UMA) No 3.3/5V
hi guys
this laptop came with water damage and no turn on problem
i resold what i find
now it still not turn on
replacing 51125 wont help
VREG3=3.3v
VREG5=5V
51125_ENTRIP=0V
51125_ENTIP1=0.7v
51125_ENTIP2=1.4v
+3D3V_PWR=0V
+5V_PWR=0V
I have another motherboard with same Enable voltages as above but 3.3-5V PWR is on
mosfets are good
what can stop it to make output voltage?
montekristo [ 11 окт 2020, 19:51 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
Replace "tantals".
pvlab [ 12 окт 2020, 05:56 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
51125_ENTRIP=0V - check if not shorted to GND.
Can be over-current protection?
R EZ A [ 12 окт 2020, 14:11 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
montekristo писал(а):
Replace "tantals".

i replaced and no change

pvlab писал(а):
51125_ENTRIP = 0V - check if not shorted to GND.
Can be over-current protection?


yes 51125_ENTRIP = 0V is shorted to ground because PQ4602 Gate is 3.3V
but pin 1 and 6 of 51125 isnt short to ground
no output voltage even after cutting PG4608 and PG4610
montekristo [ 12 окт 2020, 14:15 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
R EZ A писал(а):
replacing 51125 wont help

R EZ A писал(а):
mosfets are good

may be 51125 is bad... or mosfets not good.
R EZ A [ 12 окт 2020, 18:37 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
montekristo писал(а):
may be 51125 is bad ... or mosfets not good.


i replace 51125 aand mosfets but no change
montekristo [ 13 окт 2020, 00:58 ]
Заголовок сообщения:  Re: E5410 (Fonseca 14 UMA) No 3.3/5V
Какое сопротивление между +3D3V_PWR (+5V_PWR) и GND?
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