What if the hard reset doesn't work??
My dad just installed one of the DialPad skins from ZombieNexus and is now getting nothign but a white screen. I had no problems with the skin I installed. When trying to hard reset gets no response what so ever. Removed battery and inserted again. Same thing.:

CURRENT DEVICES -
HTC HD2 - Running 2.3 NAND by TyTung (XDA-DEVS)
Advent Vega 10inch Tablet - Running 1.09 with Paul's performance pack v8. :)
DEVICE HISTORY -
Phones (Including SmartPhones) :
Bosch 509e, Nokia 402, Nokia 702, Nokia 3210, Nokia 3310, Siemens C35i, Nokia 3330, Samsung A300, Panasonic GD75, Sony Ericsson T68i, Sony Ericsson T610, Sony Ericsson P900, Nokia 7600, Nokia N-Gage, Samsung E720, Nokia 6230, O2 XDA Mini S (HTC Wizard), T-Mobile MDA Vario 2, O2 XDA Orbit 2, LG Renoir, HTC Diamond, Blackberry 8800, HTC HD2
PDA's/Netbooks/Tablets :
Casio Cassiopeia E-125, Psion Series 5, HP IPaq 2400 & HP IPaq 3715, Nokia N770 Internet Tablet, ASUS EEE PC 701, Samsung NC10, Advent Vega