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LCD Whistles while Vee is not connected

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Arash_R

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LCD Whistles while Vee is not connected or is GND

Hello ,

i am using a graphic lcd (AGM1264F) in my Board , but something strange happens when i disconnect Vee Pin or when i connect this pin to GND , LCD Starts Whistling and plays strange noise :lol: 8-O :-?!! i wanted to know if someone has an idea ?
 
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