Hi I'm new to the forum and wondered if anyone could offer me advice or point me in the right direction. I have an old Apple Macintosh Classic M0420 which at one time I used on a daily basis. It always worked fine. When we moved it got put in the box in the loft and must have sat there for the best part of 20 years. I was having a clear out and got it down to try it out. Unfortunately the screen just showed black and white lines and it wouldn't boot up. I did some research online and saw that people washed motherboards to cure the problem of leaking capacitors. I am wary of doing this so I have cleaned the motherboard instead with isopropyl alcohol, a tooth brush and cotton buds. The lines seem less but it's still not working. Does anyone know if I should try the washing technique or is there another solution. I am not as you can properly tell a computer expert but I don't want to discard the machine when before I put it into storage it worked so well. Any thoughts much appreciated.