Technical Support acer vn7-792g 14307-1

[orlando65]

hello

I got this dead acer, connected to the power supply it gave me an absorption at 3 volts of 2 amps with the 2 mosfets close to the faulty power supply connector. I replaced the 2 mosfets but the problem persisted, I check the shorted line with boardview, INJECT 1V and I find PG4708 shorted, I replace PG4708 now the pc turns on the keyboard backlighting absorbing random 0.50 amps up to 2 amps and then moving on at 0 amps. I text again and find the 1V_VCCGT line shorted. Could it be a CPU problem? Some advice? Excuse the beginner's analysis .. Thanks

 

[Hosein Asadolahi]

hello

I got this dead acer, connected to the power supply it gave me an absorption at 3 volts of 2 amps with the 2 mosfets close to the faulty power supply connector. I replaced the 2 mosfets but the problem persisted, I check the shorted line with boardview, INJECT 1V and I find PG4708 shorted, I replace PG4708 now the pc turns on the keyboard backlighting absorbing random 0.50 amps up to 2 amps and then moving on at 0 amps. I text again and find the 1V_VCCGT line shorted. Could it be a CPU problem? Some advice? Excuse the beginner's analysis .. Thanks

1. you said pg4708 short and you replace it . pg4708 is jumper only . what did you do ?
2. how test 1V_VCCGT line and how did you make sure that line have problem ??

 

[orlando65]

My mistake sorry me Hosein i mean C4815, while for line 1V_VCCGT I took it over from C1121 short

 

[Hosein Asadolahi]

My mistake sorry me Hosein i mean C4815, while for line 1V_VCCGT I took it over from C1121 short

i said how you tested that line ???
with buzzer or ohm check ??
if ohm check , ohm ?

 

[orlando65]

i said how you tested that line ???
with buzzer or ohm check ??
if ohm check , ohm ?

with buzzer (be patient i'm a newbie ..)

 

[Hosein Asadolahi]

with buzzer (be patient i'm a newbie ..)

this section is support center bro not tutorial section . if you want learn you must watch the videos . anyway, I'm glad I can help .
you must ohm check that lines . cpu have very low resistance . so with buzzer test you cant know having problem or not .
if you want to know capicitor is ok or not you must test it outside of motherboard .
isuggest you reprogram bios and test .

 

[orlando65]

ok Hosein thank you , i'll do test with bios and i'll watch the video .

 

[orlando65]

update , you were right bios flashed power on correctly but unfortunately no screen .. anyway thanks