Acorn Electron Computer With Plus 1 Expansion + Games Bundle

I have listed this as for parts not working for the following reason..

when first powered on the system works and all keys function, after a short while it will type a line of number "2's" if the computer is then turned of and back on it will display some purple boxes. If you leave the machine off for a while and then power back on it will again initially work but follow the same sequence as above.