Hi guys,
I have an LA-9412P Dell E6540 (lvds) MB with the following issue - the board starts up (and operates normally) when the charger jack is plugged in but pressing the power button has no effect whatsoever. The power button is onboard (ie not a separate board with cable)
This is what I know:
-The bios battery is good (3v)
-The board starts with the power jack even when the bios battery is connected (not normal). With the date / time etc set up and saved, it still starts when the jack is connected.
-The power button measures 3.3v and shorts to ground normally when it is pressed (so the button itself is good)
- with an o/s loaded up, the board will successfully power off when told to do so. with the board now in the off state, it will still not start with the power button - only removing and reinserting the power jack will get it to start
Could the fault be with the power management chip or the start up chip?
Any ideas how to further diagnose?
Many thanks
I have an LA-9412P Dell E6540 (lvds) MB with the following issue - the board starts up (and operates normally) when the charger jack is plugged in but pressing the power button has no effect whatsoever. The power button is onboard (ie not a separate board with cable)
This is what I know:
-The bios battery is good (3v)
-The board starts with the power jack even when the bios battery is connected (not normal). With the date / time etc set up and saved, it still starts when the jack is connected.
-The power button measures 3.3v and shorts to ground normally when it is pressed (so the button itself is good)
- with an o/s loaded up, the board will successfully power off when told to do so. with the board now in the off state, it will still not start with the power button - only removing and reinserting the power jack will get it to start
Could the fault be with the power management chip or the start up chip?
Any ideas how to further diagnose?
Many thanks
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