I need some help diagnoising a problem with an MSI GF76 11UD (board number MS-15821 ver. 1.1.). I have the boardview buy no schematics. There is a short somewhere. When power is applied to the charger jack, the first MOSFET (PQ27) gets very hot. I thoght this was the short and replaced PQ27, but this did not fix the problem. The short seems further down the line. I removed capacitor PC250 but that didn't fix it either. I lost capacitor PC250 somewhere so I need to replace it. The boardview lists the part as C0805_H1_8. I assume 0805 is the size, but what is the value? Any pointers on this repair would be appreciated.
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Yes, 0805 non-polarized capacitor. This is a bulk filter capacitor for the SDC_IN+ line. Purchase the highest capacitance for this 0805 sized part but be sure the voltage is higher than the adapter voltage. Suggest 25v or higher.
For example, 22uF / 47uF / 10uF / 4.7uF should be fine. You can probably source from Digikey / Mouser / spare donor boards. -
Thank you. Any idea what H1_8 means?
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No. Not relevant to the part. Ignore it.Comment
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Whats the resistance to GND on CLR?
Seems like main 19V rail is shorted.Comment
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What does CLR mean? I did measure the resistance to ground on each MOSFET. The short appears on the source lead of PQ34 MOSFET. It measures about 0.5 Ohms to ground.Comment
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Current Sensing Resistor=CLR
Its usually located after 2 dc-in mosfets. Alternatively you can measure resistance to GND on pin5-8 of 2nd dc-in mosfet.
No power should be attached while measuring resistance.Comment
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I found the problem. It turned out to be a shorted cap on one of the GPU power rails. Thanks for all the help.Comment
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This specification for the MSI Katana Katana GF76 12UD Netbook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Katana GF76 12UD boardview and Katana GF76 12UD schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or...09-07-2024, 05:00 AM
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This specification for the MSI Katana GF76 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GF76 boardview and GF76 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for MSI Katana GF76 Notebook...09-07-2024, 06:21 AM
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This specification for the MSI Katana GF76 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the GF76 boardview and GF76 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for MSI Katana GF76 Notebook...09-07-2024, 04:30 AM
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This specification for the MSI Katana Katana GF76 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Katana GF76 boardview and Katana GF76 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for...09-07-2024, 04:30 AM
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Hi Folks
I'm looking for a extreme high current short killer solution for a reasonable cost.
I have an LGA1700 motherboard (ASUS PRIME Z790-P WiFi) where I exchanged the LGA socket already 3 times, and every time after the socket exchange I get a short of power supply lines VCORE (V variable) and VCCIN_AUX (1.8V).
After taking off the socket, the shorts dissappear again.
The soldermask on the socket is already partially demaged from the heat, so I have reconstructed the soldermask by manually painting the missing soldermask parts with a very small top of a...10-15-2024, 10:13 AM
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