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Seems a bit low to me but then I don't really know anything about this.
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No text and no backlight.
7 inductors on the board.
1 - 0.5K ohms
2- 1.10K ohms
3 - 37K ohms
4 - 0.8K ohms
5 - 0.7K ohms
6 - 0.7K ohms
7 - 36K ohms
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Well I changed the MOSFET and the laptop is still doing exactly the same!! On and off every 3 seconds. So frustrating.
Is there anything else I can try? I'm determined to get this going.
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I think I might change the MOSFET anyway. I have some old boards but none of them have a QA3112 on them but I found a board with 22CF FDMS3660S MOSFETs which looks similar. Could you compare them and let me know if they would be suitable? Many thanks....
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Just found another MOSFET below the one I just measured (with a coil between it) and its exactly the same QA3112
Source to Drain - 1.2M ohms
Source to Gate 1 - 1.5M ohms
Source to Gate 2 - 2.4M ohms
Gate 1 to Drain - 180K ohms
Gate 2 to Drain - 3.6M ohms.
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OK thanks for that. 😀
Source to Drain - 43K ohms
Source to Gate 1 - 78K ohms
Source to Gate 2 - 2.4M ohms
Gate 1 to Drain - 1.34M ohms
Gate 2 to Drain - 4.7M ohms.
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Will do but can you show me where Source & Drain are on this chip as it has 2 gates and 3 pins one side and 3 on the other. Thanks....
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On the CPU inductors, I'm getting 35 ohms. I might be wrong but that sounds high to me?
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Hi.
Tried a new BIOS but the laptop is doing the same on and off every 3 seconds with no picture. Time to move on to the next step I think. 🤔
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Thanks but think there is something wrong with this BIOS.
When I program the BIOS, the laptop will not come on at all or show a power or charge light and is completely dead , but as soon as I put the old BIOS back on it, it responds as it did before. So think there is something wrong with it....
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[B]HP[/B] [B]14-dv1629na model number.[/B]
[B]Motherboard DA0G7GMB8F0 REV.F
Serial Number - 5CD1466KB9
Laptop turns on and off every 3 seconds. All onboard power supplies and chips checked and ok. Suspect corrupted BIOS[/B]
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BIOS dump attached[B]HP[/B] [B]14-dv1629na model number.[/B]
[B]Motherboard DA0G7GMB8F0 REV.F
Serial Number - 5CD1466KB9
Laptop turns on and off every 3 seconds. All onboard power supplies and chips checked and ok. Suspect corrupted BIOS[/B]
​
BIOS dump a...
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Is it at all possible that the laptop is switching on and off because of a corrupt BIOS?...
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