Divarin
Veteran Member
Hi all, recently I posted about a different issue with this computer and well that issue seems to be solved after replacing the VDC.
Now this C128 has a new issue. Actually it's an old issue which I've just kind of put up with but has now grown to the point where the system is, sometimes, pretty much unusable in 40 column mode.
The issue is that the VIC output flickers between a bright/crisp picture to a dark/muddy picture. This is what you might expect if:
A) The video cable (chroma/luma) has a break in it -- That's not the issue because I use that same cable on my C64 with no problems.
B) The video jack on the 128 is oxidized or has a cold solder joint -- That's not the issue because I've reflowed the solder joints on that connector and sprayed deoxit in the jack, also wiggling the cable has no effect.
It used to only do it when the system was first started up (cold), but by the time I loaded StrikeTerm or whatever I was loading it would "settle down" and work (hence me putting off looking into it).
Now, although it's still intermittent, it's much more common and will continue to happen even after it's fully warmed up.
However, having said that, right now, as I type this, I am attempting to get it to do it again so I can test if it is observable on the composite output but of course it knows I want it to happen so it's not happening (composite or chroma/luma)
Now this C128 has a new issue. Actually it's an old issue which I've just kind of put up with but has now grown to the point where the system is, sometimes, pretty much unusable in 40 column mode.
The issue is that the VIC output flickers between a bright/crisp picture to a dark/muddy picture. This is what you might expect if:
A) The video cable (chroma/luma) has a break in it -- That's not the issue because I use that same cable on my C64 with no problems.
B) The video jack on the 128 is oxidized or has a cold solder joint -- That's not the issue because I've reflowed the solder joints on that connector and sprayed deoxit in the jack, also wiggling the cable has no effect.
It used to only do it when the system was first started up (cold), but by the time I loaded StrikeTerm or whatever I was loading it would "settle down" and work (hence me putting off looking into it).
Now, although it's still intermittent, it's much more common and will continue to happen even after it's fully warmed up.
However, having said that, right now, as I type this, I am attempting to get it to do it again so I can test if it is observable on the composite output but of course it knows I want it to happen so it's not happening (composite or chroma/luma)
