PS3 Woes, can someone help?

Bought a second hand 80gb ps3. It was working fine, but 2 things happened and grrrrr no picture, no sound. First thing I was getting it set up for internet when the electricity went out, it did come back on. Second it asked to update I clicked yes and it updated. When I tried to restart, no picture no sound. Tried the reset where you hold the power button down for so many beeps (6 I think), the problem is if the 6 reset steps come up I can’t see it. I have not unhooked any cables and I did check them and nothing has changed. I’ve Googled the problem and can’t find a solution. Can y’all help or should I call a repair service?