Re: Acer nitro 515 no power, missing 3ALW
Yeah, thanks again for your kind reply.
ca3cooh
Member
Last Activity: 03-02-2023, 04:05 AM
Joined: 09-23-2018
Location: NTB
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Re: Acer nitro 515 no power, missing 3ALW
have my hand on 0.8v PSU
sad news its PCH thats heating upLeave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
Will do sir, right now my psu only abble to supply 1.2v on 1A, not enough to make any significant heat. I will get back to you if i can get my hands on more powerfull PSU...Leave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
Yes sir, if i remove PJ401, pin 1 no longer short.
Background story,
I buy this board on dead condition, further checking i found the controller ic for VCC_CORE is faulty. After i replace the ic it turn on ok, albeit i cannot uses its IntelHD vga, i can only uses its dedicated NVIDIA vga.
Just to make everything save, i modify this device so it uses 2 more additional 5v fan with buck converter from 20v.
I used buck converter to stepdown 20v to 5v so the additional fans did not put more...Last edited by ca3cooh; 11-07-2021, 08:53 AM.Leave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
i calibrate my meter with both known voltage and resistance, and its showing correct value.
Proceed to disconnect junctions related to 3VALW and no short persist on receiving pin.
Connection that i removed were PJ1402, PJ7105, and PJ7108.
just For thorough checking, i remove all of the blob on pins above, but 3VALW stil short.Leave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
those caps were ok, proceed to remove PJ401 as you suggested, and the short side were on pin 2 (3VALW rail)Leave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
Found short on 3VALW rail, proceed to remove inductor PL402 praying to god that the short were on PU401 side, but to no avail.
Short were on 3VALW rail, reading on multimeter were 0v on diode mode.
Is it save to say that this mainboard is toasted ?...Leave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
yes, both gates were 20vLeave a comment:
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Re: Acer nitro 515 no power, missing 3ALW
noted, thankyou sir.
All of them were on 20V pluged in....Leave a comment:
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Acer nitro 515 no power, missing 3ALW
Pardon me, complete noob here.
I have a acer nitro with schematic attached
My laptop died after upgrading win 10, it become unresponsive sometime, afteri force shutdown it, sometime it boot, sometime windows did not load, and finally it did not turn on at all.
My measurement is as follow :
3vlp and 5valw missing
VCC EC missing
tried injecting power to JPB1, it measure 500mA on 3v.
5valw rail ok no short, tried to turn it on and it works ok.
First standard attempt usually to flash its bios, but bios is not on, pin 8 on UH2 is low,... -
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Thank youLeave a comment:
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Re: Lenovo 120S no backlight. Schematic needed
here it is bios and everything
[url]https://www.badcaps.net/forum/showthread.php?t=83026[/url]Re: Lenovo 120S no backlight. Schema...?t=83026[/url]Leave a comment:
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Re: 120S_MB_V1.0 Schematic
awesome. Thank you so much
For you google searcher, here it is equivalent to Lenovo Ideapad 120SLeave a comment:
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in case somebody need it...Leave a comment:
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have u update its bios ?
sometime we need to update its bios to recognize latest batteryLeave a comment:
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Re: Need schematic asus x200ca rev 2.1
Thank you sirLeave a comment:
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super newbie here,, hello for all of you awesome peoplesLeave a comment:
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