mobile

My dad's phone suddenly stopped working. It would start up, load the HTC logo and just stayed there until the battery died. As far as I know, he hasn't done anything to the phone that would cause this kind of error. I started looking into solution, I ran Recovery and Factory Reset from the Fastboot menu. Both didn't affect the device, it would still stay on the HTC logo. I recently tried upgrading the ROM using HTC's RUU exe to fix any Rom issue. I downloaded the ROM from their official site. The exe ran all the way through and even said finished at the end, but the phone now has a black screen. No lights at all and no LEDs are lit up. I tried restarting the phone by pressing and hoding the PWR button, PWR + Vol down, PWR + Vol up, and PWR + Vol up + Vol down and I get nothing. If anybody could help, I would greatly appreciate it. Thanks in advanced.