<big>'''Common Faults on Bought a CPC 6128:from eBay and its not working ? Then read on..'''</big>
Bought a 6128 from eBay Firstly, make sure your 5v power supply and not monitor are working ? Read onok.(You'd be surprised...)
Assuming the power supply and monitor are working, the The most common fault is probably someone having plugged a 12v PSU into the 5v socket.
This usually fries some or all of the ram (memory) and may sometimes damage a
few ceramic capacitors along the way.