Because of crystal contamination, or a "charged" state of the Liquid crystal due to an un-wanted DC Bias. The liquid crystal is being driven with a large enough DC-offset most likely caused by leakage currents from either contamination/moisture, or failing TFT transistors in the substrate, this then causes the crystal to build a charge like a capacitor. And thats the effect you see.
Post #26 by techknight
| Source Forum | Tunnel Vision On Monochrome Active Matrix Powerbooks — #26 |
|---|---|
| Category | Troubleshooting |
| Post Date | Fri, 30 Aug 2013 - 04:03 |
| Original URL | https://68kmla.org/bb/threads/tunnel-vision-on-monochrome-active-matrix-powerbooks.28706/ |
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