How to adjust brightness alternatively? What if system brightness control does not work ?

How to adjust brightness of android phone alternatively ?

I am on HTC One X. I just noticed my phone's system brightness control is not working as I recently got my phone repaired. My phone's display IC has been changed as display was not working as my phone got wet.

I doubt the one who repaired a phone changed display IC of other phone, that's why the brightness control is not working. 

So, is there any alternative way to control the brightness in android phone ?

Whatever app so far I have installed regarding brightness control seems to do the same thing what system brightness control does. So, nothing worked for me.
You may want to use the Screen Filter app by haxor industry. I use it primarily for keeping my screen dark at night for reading, but it may be a suitable temporary solution in your situation.