I have an older PS2. I bought it used. It's been working fine for the last 2 years. I was playing FFXII, I powered it down, went to work and came home to continue play. But when I powered it up the power light turned on but the blue light didn't turn on and it didn't load. there is no video or sound. any ideas?

I took it to a friend he said it maybe the power supply so I replaced it and it does the same.