Re: Acer Swift SF314-54 charging, not powering up
I'm just thinking if my BIOS or CPU is bad. No more interest to find fault if there is something bigger going on.
I'm not an expert about reading those sequence things. If I'm reading something wrong there might be days of work with no sense. Laptop will be binned soon.
Big thanks to everybody who tried to help with this thing....
kuupotin
Member
Last Activity: 03-27-2023, 02:21 AM
Joined: 08-12-2016
Location: Oulu
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Re: Acer Swift SF314-54 charging, not powering up
No updates. I'm stuck......Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Could my CPU be shorted/bad? Or bios chip?Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
13 ohms..
0.017V with diode measurement...Last edited by kuupotin; 02-11-2023, 06:41 AM.Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
2.94V and 2.93V. It has dropped a little from inserting.
Made a new one. 3.240V and 3.238V..
There is some coil whine when battery or charger attached. Whine stops and starts after a while when pressing reset button on mobo sub board....Last edited by kuupotin; 02-09-2023, 11:45 AM.Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
That might be problem with first measurement. Second measurement was after 24h without power....Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Cmos battery new. After connecting to mobo, only very slight drop in voltage. I'll measure it later today....Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
After a day I measured gate again. Now it's 100k, positive to gate, negative on ground(copper screw post). No power on board for 24h.
cheesh....
EDIT: and now its infinity. What the .. is going on?...Last edited by kuupotin; 02-08-2023, 09:22 AM.Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Well, strange....
Removed q1701 and measured resistance again. When positive probe on gate there is only 2 ohms, but when reversed probes, it shows 460 ohms.
Tried inject 1V to gate, positive on gate, there was no current. Backwards it took 50mA. WTH......Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
resistances
Q1701:
gate 620 ohm
drain infinite
source infinite
G1701:
pin2 infinite
pin1 ground?...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Ok, big thanks. Let's put that behind the ear (finnish saying to keep something in mind)...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Ok, i'll start to find some vendor who is selling preflashed chips. I'll wait a moment if someone will confirm this fault true.
Big thanks to you 👍...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
So if KBC is faulty, am I able to replace it or should it be flashed?...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
After resistor remove. 0,012V
after mosfet same......Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Am I reading this right?
Signal from RTCRST_ON pin106 tells to switch mosfet Q1701 on. So is there something wrong in mosfet or near?...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
0,009V something wrong here......Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Here...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
PINS: 16, 17, 37, 67, 124, 125
3,3V
PIN: 111
2,9V
PINS with 0V: with power/no power resistance
100 51/10k
103 52/320k
106 7/8
107 20/92k
111 2,9/very high
121 20/10k...Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
280 ohm 5Vcoil.
I don't know 3V coil location....Last edited by kuupotin; 02-05-2023, 02:24 AM.Leave a comment:
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Re: Acer Swift SF314-54 charging, not powering up
Affs... Lets try this....Leave a comment:
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