I had Apple quote me $900 to replace a failed screen (no visible damage, but no image either) and tell me that they weren't sure it would even work because of "

I had Apple quote me $900 to replace a failed screen (no visible damage, but no image either) and tell me that they weren't sure it would even work because of "liquid damage" to the mainboard. I can assure you that the computer never got wet. I bought a replacement screen from ifixit for less than half the price and installed it myself in an hour.