AceCobra1

I bought a NW-HD3 online to try to get it repaired. When I boot it on, it just shows the walkman screen then freezes... any idea what is wrong? I heard it is quite a common problem... I too the harddisc out and seems to be spinning... was gonna try to format it coz i can plug it into my tr1 but was gonna ask u guys if u know how to repair it