I compared 2 boards LA-4982P, UMA and MXM version, too many things to change.
Even without boardview, you need to check every element, including the jumpers.
The MXM version does not have an HDMI chip for UMA.
If you look at the diagram, you need to put everything marked GM@ and IHDMI@, remove/replace everything marked PM@ and NIHDMI@. Short-circuit the jumpers PJ27, PJ28, PJ29, PJ30, PJ31, PJ32.
And who knows what else...

Schematic - https://www.badcaps.net/forum/docume...500-series-lap...