Post by robheaton on Jul 7, 2018 14:59:50 GMT
Hello,
I've recently been given a faulty C128, when starting in C128 mode, the screen is black, regardless of 40/80 display mode.
When starting in C64 mode, the screen is a blue garbled mess;
I've tried a new PSU and replaced the 74LS257 in both U14 & U15.
I also tried piggy backing a new RAM chip onto each chip, but that made no difference either.
Does anyone have any suggestions?
I've recently been given a faulty C128, when starting in C128 mode, the screen is black, regardless of 40/80 display mode.
When starting in C64 mode, the screen is a blue garbled mess;
I've tried a new PSU and replaced the 74LS257 in both U14 & U15.
I also tried piggy backing a new RAM chip onto each chip, but that made no difference either.
Does anyone have any suggestions?
