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  • Don't use a multimeter - but the charger works with another C720 so I know it is good. Also, the battery is a replacement from Acer (I have tried multiple batteries - each from devices that work with the batteries in them). But I get the same result. While I am interested in solving this problem -- I don't want to lose…
  • MAPS_Tech and eric5 -- we are also a school district with over a thousand deployed Acers (C720 and C740) -- would you like to compare notes on common issues and practices?
  • This is likely a loose wire connection between the display and the motherboard. If it is in warranty - send it to Acer for repair. Assuming your product is out of warranty (so need to repair it yourself rather than send it to Acer) -- you can take display bezel off and back case to disconnect and reconnect the wires. This…
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