Hi,
I'm learning about motherboard repair and I believe I've traced the issue down for the South Bridge on the particular motherboard I'm working on. My path of concluding that:
- There's no sign of any attempt to power on when pushing the power button.
- No PSON signal is reaching the 24-pin ATX connector.
- The Super IO chip is receiving the PS_SWITCH signal from the power button and is relaying this signal back to the South Bridge.
- The Super IO is not receiving the S_SLPS#_R signal back from the South Bridge
- If I pull the Super IO S_SLPS#_R pin...
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by Ancient1Hi
I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!
[U]I want to try and power up the laptop [/U]
Battery is swollen. But I don't want to buy a new battery right now , of course .
I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who...8 PhotosToday, 12:46 AM -
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[ATTACH=JSON]{"data-align":"none","data-size":"full","title":"grafik.png","data-attachmentid":3253284}[/ATTACH]Hi,
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I have a LENOVO V15-ADA that it not turning on.
The motherboard that it has is GV451&GV551 NM-D151
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by trepachkaSee attached image. It says "X322" on it. This is a follow-up to my previous posted topic. The issue is upon lid closing, the screen turns off. When lid is opened, the screen remains dark.
This component is positioned right on the edge of the motherboard and has like a cradle made inside the case. I am assuming this component is used as a lid close sensor.
Please, help me identify it. Thank you....Yesterday, 03:26 PM -
by Ancient1Hi
I received such Laptop as junk. Opening it I saw a lot of whitish water residue , but no corrosion really ( few coils have small brown rust marks, no green copper ).
I cleaned all thoroughly and interestingly , its the Battery BMS board that has the real corrosion spots.. under the protective clear Goo !!
[U]I want to try and power up the laptop [/U]
Battery is swollen. But I don't want to buy a new battery right now , of course .
I started work on the BMS by zooming in on green spots . 2 VIAs are filled with rusted copper goo - who...8 PhotosToday, 12:46 AM -
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Channel: BIOS Requests ONLY!
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[B]LINK to Schematic[/B] -> [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/77167-required-t480-nm-b501-schematic[/url]Please help friends, thinkpad t480 nm-b501...Yesterday, 08:34 AM -
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