somebody can help me?
No BEEP, no DRIVE running; only garbage on screen (see pic)
Cleaned pins of ROM, CPU but nothing.
Replaced all 3764 with 4264...some time at switch on I hear the beep but always garbage. Reset combination works but the drive runs for few seconds without success.
Tried to replace the 6502 with 65c02 removed from working iic. Nothing
Tried to replace the rom with iic rom. Only vertical strips on monitor.
My doubt is a sort of "white oxidation" found on the IC of existing rom (see pic).
I've found this on ebay,
someone can suggest me if purchasing?
Could be the problem?