I recently purchased a used D830 laptop. I have upgraded the memory to 8GB...added an SSD with 8.1 added a new 9 cell battery and changed the screen to a new Sharp 1920x1200 with new inverter, as it had a 1200x800 screen in it and has the Intel GPU, not the Nvidia. All seemed to be well, until I unplugged the machine from the AC outlet/charger. The screen goes dark on the left side and flickers and there is a high pitched squealing sound coming from the inverter. If I plug it back in to AC, the problem goes away and all is well. What would cause these issues? Thank you very much.
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