Technical Support Acer aspire la-5271p kalg1

[user24495]

This laptop, it power on only 5 seconds.. I've switching mosfet 5valw to 5vs .. 5vs is not present when i power on .. I checked 3vs its present when i power on.. Any idea sir?

 

[Hosein Asadolahi]

This laptop, it power on only 5 seconds.. I've switching mosfet 5valw to 5vs .. 5vs is not present when i power on .. I checked 3vs its present when i power on.. Any idea sir?

hi
check pin 28 of pu4 . its must be high . thats signal name is SPOK . check it and report .

 

[user24495]

Update: hello sir, i checked the pin 28 of pu4 its voltage reading is 5v sir... What next should i do..

 

[user24495]

Update : sorry sir , i have my mistake , i thought the one i checked with 3vs is u16, it was u18 .. So 5vs and 3vs is not present sir when power on

 

[user24495]

I try to replace the two mosfet.. But same problem

 

[Hosein Asadolahi]

Update: hello sir, i checked the pin 28 of pu4 its voltage reading is 5v sir... What next should i do..

volt check this signal when system run :
+vsbp
susp
SBPWR_EN#

 

[user24495]

volt check this signal when system run :
+vsbp
susp
SBPWR_EN#

+vsbp = 19v
Susp = not present
Sbpr_en# = 5v

 

[Hosein Asadolahi]

if :
+vsp = 19
susp = 0
3.3v alw and 5valw present
you must have 3.3vs and 5vs , unless IN THIS LINE HAVE PROBLEM .
ohm check pins 1.2.3 on u20 and u16 .

 

[user24495]

if :
+vsp = 19
susp = 0
3.3v alw and 5valw present
you must have 3.3vs and 5vs , unless IN THIS LINE HAVE PROBLEM .
ohm check pins 1.2.3 on u20 and u16 .

Ok sir thanks , i double check that line sir..