Search found 286 matches

by banman
Tue Aug 09, 2022 5:55 am
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

Here are some more photos of documents related to correct signals one should observe on C64 IC chips. All 8 x 4164 Dynamic RAM IC chips should have these signals. Please ignore the writing in Biro, these were my notes on testing another machine. IMG_20220731_152045.jpg These are the correct signals ...
by banman
Tue Aug 02, 2022 5:14 am
Forum: Chit Chat
Topic: Hey at least returns are accepted
Replies: 3
Views: 57

Re: Hey at least returns are accepted

WOW! I got a discounted price!!
by banman
Sat Jul 30, 2022 6:11 am
Forum: Chit Chat
Topic: Hey at least returns are accepted
Replies: 3
Views: 57

Re: Hey at least returns are accepted

LOL! :lol:
He's got some others there too at a big price tag. He says he does discounts on combined shipping.
by banman
Sat Jul 30, 2022 12:11 am
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

by banman
Mon Jul 25, 2022 10:14 pm
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

Was that a typo regarding CPU socket connection pin 16 or pin 15?
by banman
Mon Jul 25, 2022 9:55 pm
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

Hi dpalmeira, You are doing good work in methodically checking everything on the board. Slowly and steadily you will beat this to your will. Remember that when you get frustrated take a break and do something else. Am I correct in understanding that the CPU socket had a faulty wiper connection? Is t...
by banman
Sun Jul 24, 2022 2:48 am
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

Here, Adrian talks about experiences with chip testers and diagnostic cartridges



by banman
Fri Jul 22, 2022 11:23 pm
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

Hi dpalmeira, I just want to touch on a subject that I discussed earlier in this thread regarding fake chips and also too chips that go out of specifications due to age, failure, etc.... I found this great YouTube video from Noel's Retro Lab on fake chips. Very interesting! He goes into detail on co...
by banman
Fri Jul 22, 2022 11:07 pm
Forum: Help!
Topic: C64 ASSY 326298 ToD issues
Replies: 2
Views: 294

Re: C64 ASSY 326298 ToD issues

Hi cmherndon79,


I was just browsing YouTube and found this very interesting video from Noel's Retro Lab.



Have you investigated the clock circuit on your C64 mainboard?
by banman
Wed Jul 20, 2022 1:13 am
Forum: Help!
Topic: c64 - ASSY 250425 Black Screen
Replies: 80
Views: 1377

Re: c64 - ASSY 250425 Black Screen

I found some more IC chip tests.

Ignor the stuff I've written in Biro on the last image. I was checking out something on a C64 mainboard.