Hello My friend has a Hp Pavilion Elite e9120y with these specs:

Hp Pavilion Elite e9120y

Motherboard

M2N78-LA (Violet3)

Processor

AMD Phenom II X4 910

Memory

8 GB

Memory upgrade information

Video graphics

ATI Radeon HD4350

Integrated graphics using nVidia GeForce 9100

Sound/Audio

Integrated Realtek ALC888S Audio

Networking

LAN: 10-Base-T

802.11 Wireless a/b/g/n PCI-Express x1 card

Hard drive

1 TB

CD/DVD disc drive

DVD+/-R/RW 16X 12X +/-DL LS 12X RAM SuperMulti SATA drive

Blu-ray Player

Memory Card Reader

15-in-1 multimedia card reader with passive IR receiver

Computer Case

Mid-size ATX

Power Supply

300W

I/O Ports

Front I/O ports

Back I/O ports

Keyboard, mouse and input devices

HP USB keyboard

HP USB optical mouse

Software

He said it worked fine for around 1yr, then all of a sudden it froze online. Now when he boots up the monitor will say no signal, and if it gets passed that it goes straight to reboot or insert boot media and press key screen. We have tried a new hard drive, a new OS (Windows 7). Also sometimes when rebooting the keyboard wont respond, and the computer will not boot at all. Anyone know what we could try to fix this?

Any help would be great,

Thanks,

Kolten

If any additional details are needed feel free to let me know.