To alter the contrast of the LCD screen on your Yealink T19P, you just need to follow the steps below.
On your handset, press the following: MENU SETTINGS BASIC SETTINGS CONTRAST
Press or to increase or decrease the intensity of the contrast (the default contrast level is 6)
When you are happy with the contrast press the SAVE soft key or if you want to exit the contrast menu without saving the changes, press the BACK soft key.
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