A week or two ago, my phone was lagging, so I pulled the battery out to restart it, as it wasn't restarting from the OS. It turned on to the HTC logo, then the screen went black. The rest of the phone works, including the digitizer and volume buttons. I purchased a replacement screen and installed it. The issue remains. I'm able to boot to Recovery and use a Java program called Android Screen Cast to see the display. Unfortunately, the display signal is corrupt, so I'm unable to test if a ROM reinstallation would work. I doubt it would in the first place, though, as Recovery, Fastboot and Hboot don't show anything as well, so it's most likely a hardware program. What could this be? I'm stumped on this one, and I'd like to have a phone to use until I have enough money to buy a replacement.