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I have a Tandy 1000 SX, and I am having a very, very hard time getting any of the old hard drives that I have working. I have a Seagate ST-238, and a Miniscribe 3438 P. Both are RLL hard drives. I am using a Western Digital WD1002A-27X as the controller card. I don't believe this has anything...

I have a TRS-80 Model III (recently acquired) and the lower drive works just fine. I can boot with TRSDOS boot disk no problem. However, when I try to put a disk into the upper drive and list a directory, it tries to, but just keeps moving the head out and back, out and back. It does this...

Hello everyone, I have an INTRA LT-386SX laptop that I'm trying to troubleshoot. It was given to me by a friend, and even though the power supply they gave me "fits", it's not the original. Therefore, I'm not sure if it's even giving the proper voltage output. I've searched and searched, but...

I'm building my own Commodore 64 PSU. I have the 5V line working fine, however I'm having trouble finding a good 9VAC 1000mA transformer to use. Maybe I just don't know the correct search terminology. I would prefer to get one that is not encased in a wall plug housing, that way I can wire it...

I recently purchased a Commodore 64 from eBay. It's Assembly #250407-04. When I got it, I hooked it up and it seemed to work fine, however I didn't really do any further testing. A week or so ago, I went to play a few games and I noticed that I'm not getting any sound at all. The SID is a...

I have a Commodore PET 2001-8 model. Following several guides, namely the ones listed here (http://www.vcfed.org/forum/archive/index.php/t-43349.html) as well as here (https://www.c64-wiki.com/wiki/PET_2001#CB2_Sound), I was able to create a working sound mod. It utilized a Piezo speaker and...

I have a Commodore 8050 that I just recently purchased. The drive arrived very well packaged and showed no sign of damage. When I turn it on, I get the self test and the light goes green, which I believe indicates the power on self test process returned zero errors. I am trying to find a way...

I've been trying and trying to get some games to work on my Commodore PET 2001-8 system. I do not have any original cassettes, so what I've done is downloaded several games in .tap format (https://retrocomputerverzamelaar.nl/commodore-pet-tape-wav-files/) and then I used audiotap software to...

I have a TRS-80 Model 4 that is having video problems. I have uploaded an example of what it's doing to YouTube so you can see exactly what it's doing. I already replaced 2 bad capacitors, hoping that would fix the problem, but it did not. Example Video ...

Hi, I have recently acquired a Commodore PET 2001 computer and have been having some trouble. At first, it came on but only showed random characters all over the screen. I carefully removed and re-seated all the chips I could find, starting with the memory. After doing this, I was able to...

Hello, I have a Model 3 motherboard where the data port for the FDC flat cable has pins which have broken from the socket to the motherboard. I removed the bad socket, however I need to find a replacement. Either an entire socket to re-solder, or if anyone knows what the little metal pins are...