Mobile phone - White screen , stripey screen. how...

Question

I changed the main LCD screen on 2 phones (both sharp GX10's) as they were both stripey .I bought 3 screens off ebay - changed them over but none of the 3 new screens cured the fault. and now the screens are just white. What does a white screen mean? - is it definitely a fault with the LCD? I only ordered 1 screen but they sent 3, and said that sometimes they dont always work which made me wonder - so maybe I bought 3 duff LCD's !!? . Thanks. and Best Regards, Ian.