BurritoBeans Posted February 20, 2015 Share Posted February 20, 2015 'ello So recently I grabbed a breadbin brown-with-black-keys C64 for $35 because if it didn't work then it had two working PSUs and a good condition box. When it got here, it kept black screening until I had started messing with the RF cable. It gives me the screen in the picture, but I have to take out the RF cable, put it back in, turn off the system, turn it back on, flip the channel select to the right then back to the left. I'm thinking the RF modulator is dying in it and that is all, but I don't know. I want to get this thing having the blue on blue READY screen like my other C64, but don't know how. Any help is appreciated! Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 20, 2015 Share Posted February 20, 2015 Can you test it on another TV, preferably an older CRT type? Might be a PAL machine on NTSC TV. Or might be the TV can't sync to the computer's signal. Lots of modern TVs and recording gear have problems with old computers. Quote Link to comment Share on other sites More sharing options...
BurritoBeans Posted February 20, 2015 Author Share Posted February 20, 2015 (edited) I tried it on my CRT, and it just doesn't work. The "fuzz" goes from grey to black with blue and red dots scattered around. It may be the TV itself though for that, it's not 80s CRT, more 2000ish. I used the same PSU but I didn't take my Coax adapter with me so I used a NES RF box thing. Edited February 20, 2015 by BurritoBeans Quote Link to comment Share on other sites More sharing options...
skosh Posted February 20, 2015 Share Posted February 20, 2015 I agree with Rybags that it is possibly a PAL machine as a rolling screen and black and white are what usually happens when connected to a NTSC screen. You may want to open it up and look for the VIC-II chip(graphics chip). The NTSC had these part numbers - 6567/8562/8564 and PAL had these 6569/8565/8566. Quote Link to comment Share on other sites More sharing options...
BurritoBeans Posted February 20, 2015 Author Share Posted February 20, 2015 Ok, I'll do that in a bit although the switchbox says NTSC on it when I separate the halves Also, sometimes when I get the scrolling screen it starts going crazy and random lines go all over it. If I can get it again I will post a picture of it on this post later. Quote Link to comment Share on other sites More sharing options...
BurritoBeans Posted February 20, 2015 Author Share Posted February 20, 2015 Ok. I took the RF shielding off and the part number on the VIC II is 6567R8. Now it black screens about 50% more though, so could it be that my VIC-II is dead? I have did the same things I have been doing but I cannot get the rolling black and white screen anymore. Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 20, 2015 Share Posted February 20, 2015 VIC 2 versions are 6567/8562/8564 (NTSC) and 6569/8565/8566 (PAL) so you definitely have NTSC there. How do other old computers and consoles go on that same TV? Quote Link to comment Share on other sites More sharing options...
BurritoBeans Posted February 21, 2015 Author Share Posted February 21, 2015 (edited) The IBM PS/2 55SX runs fine using the VGA in, I've never tried Apple II as I have 4 monitors for 3 Apple IIs/clones as I heard something about special video encoding and the 600XL sits around on the CRT. Modern PC doesn't count as HDMI. Edited February 21, 2015 by BurritoBeans Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 21, 2015 Share Posted February 21, 2015 600XL would be the closest match, you should try it. Quote Link to comment Share on other sites More sharing options...
BurritoBeans Posted February 21, 2015 Author Share Posted February 21, 2015 (edited) 600XL works just fine for me on this. Edited February 21, 2015 by BurritoBeans Quote Link to comment Share on other sites More sharing options...
Rybags Posted February 21, 2015 Share Posted February 21, 2015 My theory then would be the C64 has a dud video circuit or faulty Vic-2 chip. Quote Link to comment Share on other sites More sharing options...
Shaker68 Posted February 9, 2020 Share Posted February 9, 2020 On 2/20/2015 at 9:06 AM, BurritoBeans said: 'ello So recently I grabbed a breadbin brown-with-black-keys C64 for $35 because if it didn't work then it had two working PSUs and a good condition box. When it got here, it kept black screening until I had started messing with the RF cable. It gives me the screen in the picture, but I have to take out the RF cable, put it back in, turn off the system, turn it back on, flip the channel select to the right then back to the left. I'm thinking the RF modulator is dying in it and that is all, but I don't know. I want to get this thing having the blue on blue READY screen like my other C64, but don't know how. Any help is appreciated! Had exactly the same problem on a couple newly acquired C64c machines Tried 3 different LCD monitors using video, S-video and RF with no change in results Then dug out an old Toshiba CRT and it worked right away on all signals I guess using vintage with vintage works best :) Quote Link to comment Share on other sites More sharing options...
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