Display issues are 1 or more of 3 things.
- The power inverter is bad -
- The LCD panel is bad-
- The video adapter is bad-
You most likely are looking at the second option, and have a bad LCD panel, and it needs to be replaced. This is generally worth the repair to keep the unit portable. If it might be time to consider purchasing a new unit, the old unit can generally still be used as a stationary work-station in conjunction with an external vga monitor (any standard computer monitor).
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