Sunday, Jul 31, 2011 at 18:52
Hi Serendipity,
touchpads can be temperamental if other than the original power supply is being used.
Because they depend on the capacitive coupling between your fingertip and a virtual ground, any RF from either the non standard power supply, or like in your case from the inverter can confuse the signal generation circuit (your body acts like a receiving antenna for this RF noise).
You can try to eliminate or at least sufficiently attenuate the electrical noise coming from your fingertip by doing the following:
put some layers of thick rubber sheeting under your inverter so that it's not in close proximity to the chassis.
If that doesn't fix it, put some aluminium foil under your laptop, and touch this foil with our arm when working the touchpad.
If that still doesn't help, you can try and establish a galvanic connection between laptop ground and the foil. You could roll some foil between your hands into a thin conductor and stuff it around the VGA socket and make the other end touch the foil - keeping one arm/elbow on the foil while touching the pad should finally make it work.
cheers, Peter
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