Search found 79 matches

by C64Person
Tue Jul 25, 2023 5:46 am
Forum: Help!
Topic: Commodore PET CRT Adjustments
Replies: 2
Views: 496

Re: Commodore PET CRT Adjustments

This is fantastic information, thank you. I think the yoke is pretty centered now, and it's not doing any of the things you suggested would be caused by bad capacitors. It's really just the right side and bottom of the picture that are just not straight lines at this point. I was able to generally s...
by C64Person
Tue Jul 11, 2023 9:42 pm
Forum: Help!
Topic: Commodore PET CRT Adjustments
Replies: 2
Views: 496

Commodore PET CRT Adjustments

Hello, So I recently acquired a PET 4016, which I cleaned up and got working again. However, I'm running into an issue with getting the picture centered right on the CRT. It's not terribly obvious in the photo as it is in person I think, but it's way off center to the right and the edges are not at ...
by C64Person
Wed Apr 26, 2023 8:58 am
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

Hello! Not sure if reviving this old thread is a bad thing, but I thought it'd be nice to come back to it. I booted up my C64 for the first time in a couple years today and I was particularly excited to see it still works! I've missed working on this machine and I'm planning to get back into it; I m...
by C64Person
Sat Oct 24, 2020 9:37 pm
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

I have finally had a free moment to work on my C64, and the character Rom was indeed causing the problem. I reseated the chip and this fixed it. I am still slightly concerned about the socketed chips, as occasionally a bump or moving of the computer causes a system crash, but it is very much better ...
by C64Person
Sat Sep 26, 2020 2:25 am
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

I did discover that the bumping crashes were related to the jumper I had soldered onto U9 back when I realized there was discontinuity from that chip to the other RAM. A little bit of the exposed wire would touch a nearby pin if force was exerted on the board (bumping probably would have caused this...
by C64Person
Sat Sep 19, 2020 10:04 pm
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

Good news! My new 1571 arrived and it works great! It is very nice to finally have a fully operational C64 setup! I have a few more kinks to work out, but overall things are looking good. The stepper motor runs very loudly - is this something that can be fixed? As long as it’s not a problem I can li...
by C64Person
Wed Sep 09, 2020 10:48 pm
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

Ok, this is all good to know. In this case, I will try to look for the best pricing options, but will favor 1571 if possible. I am not necessarily opposed to Newtronics, but as you said it seems they often have bad heads, so I would definitely only get one that has tested good. That's too bad about ...
by C64Person
Wed Sep 09, 2020 7:22 pm
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

Alright, I will buy a new drive then. I was hoping to fix mine but I don't think that's possible. I'm new to this stuff, so do you recommend buying another standard 1541 like the ones I have (Newtronics 1541 with internal psu) or "upgrading" to a newer/possibly more reliable Commodore driv...
by C64Person
Wed Sep 09, 2020 1:44 pm
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

It runs two head bang cycles and then gives up when running the LOAD"*",8 command, which sounds like what you described as it failing to read and trying to reset itself. Running a format just brings the head back to track 0, where it does one banging cycle and then stops right there. The r...
by C64Person
Mon Sep 07, 2020 3:29 am
Forum: Help!
Topic: C64 With Black Screen
Replies: 147
Views: 61667

Re: C64 With Black Screen

I do get the flashing light when trying to access the drive, and the error is 21,READ ERROR,18,00. When trying to load from the drive, it does two head banging cycles before the red light begins flashing and FILE NOT FOUND ERROR is printed on the screen. Is it abnormal for the head to bang like that...