My display not working

My laptops display not working only blank screen shows even after i changed display cable and display 2 times. After changing display my laptop display worked 15 days than after same problem arises again.

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do you have a way to connect it to an external monitor to check if it works ?

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When i replace my display 10- 15 days working very well after that i becomes blank and the problematic display if tested on another laptop the same display working.

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