Hi TP-Link community! 

I would just like advice on my Deco E4 unit. It was working well as the main deco when I first bought it. But after a few weeks, the LED light began blinking white. It was unable to be detected by the app. It never changes color. It is always blinking white whenever I plug it in. And take note, this is not the same type of blinking that indicates firmware update as I have seen that on my other deco units. The firmware update blinking is like a slow pulse.
My malfunctioning deco unit shows a fast white pulse. 

I have tried plugging it again using an ethernet cable as the main deco but since the LED never turns blue, it is never detected by my app. I have tried resetting it many times. I have tried letting it rest overnight and plugging it again the next day. Nothing works. Hopefully, this is something that can still be fixed or someone might have gone through something similar? Please let me know. Thank you in advance!