dell power supply

trying to use an old ac/dc power supply with a latitude c840. the connector
has a third pin that allows the computer to detect whether the supply is
90w. how do i wire in the third pin to make the laptop accept that the unit
is 90w?
Reply to
John Ray
Loading thread data ...

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.