Question about HP Compaq 6720s Notebook
If you have access to an external monitor, try connecting it to the laptop. If you have video, then press and hold the Fn key and tap the F7 key. This toggles the video from LCD only to external monitor only to both in three taps. If you still have no video on the LCD but you do on the monitor, shine a bright light on the LCD display. you may see the video displayed. If so, then you have either a bad back-light or a bad LCD inverter in the laptop display. I would suggest replacing both to be on the safe side. A bad LCD can damage the inverter and a bad inverter can damage the LCD.
Posted on Mar 30, 2011
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Posted on Jan 02, 2017
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