Nice save, Ken. About some of the comments about swapping the SIDs. Just goes to show that people making comments probably should do some research before they comment.
Nicely done, Ken. Only thing I would have done differently, like @rdh2059 said, would have been to swap the sockets one at a time and tested after each. That way I would have known the specific cause of the issue. I'm kind of obsessive that way. I want to KNOW!!! But what you did was good since it obviously solved the problem. Congrats on a working C64!
I had been Soldering and Desoldering chips and sockets for days one at a time (on this and my other C64). I actually desoldered the parts on autopilot, I was half way through the 4th one when I realized I had WANTED to do them one at a time!
A couple issues I saw in your testing process: When you first tried the SID test with the harness, it was the SID with the black heat sinks. When you tested the SID in your known working computer, that SID had silver heatsinks on it. When you tested the computer with the "SID" issue the second time, you used the SID with black heatsinks again. IMO you should have tested it first with the known working (silver heatsinks) SID. You should have also tested the SID with black heat sinks in the known working computer. In hindsight, you know both SIDS work, but it would have made things less confusing and more certain had you tested both. The other issue is that NOT testing each time after replacing each individual socket was a mistake. You can theorize all you want, but you don't know for certain which socket was causing the issue. Yes, you have a working board now - CONGRATS! That said, for your own edification and learning, it would have been best to do a more thorough set of tests, by testing each individual socket before and after the replacement...
The working C64 has a different chip layout, the silver heat sink is the PLA. The SID chip spot on that board is above the PLA. On the non working board it is below the PLA. I had specifically use diffent color heat sinks on the PLA and SID so I would not get them mixed up as the boards I have have different chip positions.
@@CanadianRetroThings Good idea on the different colored heatsinks, as those 2 chips are virtually identical with the numbers on the top covered with the heatsinks. Another thing, "just-in-case" is to label or write the chip number on the bottom of the chip. That way you know for sure... Years ago I picked up a Dymo Labelwriter Pro. I absolutely LOVE this device. I make chip labels, 3.5 inch disk labels, 5 1/4" disk labels, etc... Labels are much easier to read after years of use, whereas permanent markers get covered up and disappear if cleaned with alcohol or component cleaners...
A quote by Phyllis Diller....now THAT is a delightful bit of "retro".
It is a classic!
Awesome job fixing that C64! WOOOHOOOOOOOOOO!!!
Thanks! I'm glad this one worked out!
Nice save, Ken. About some of the comments about swapping the SIDs. Just goes to show that people making comments probably should do some research before they comment.
It took me a little bit to get used to those chips being swapped!
Nicely done, Ken. Only thing I would have done differently, like @rdh2059 said, would have been to swap the sockets one at a time and tested after each. That way I would have known the specific cause of the issue. I'm kind of obsessive that way. I want to KNOW!!! But what you did was good since it obviously solved the problem. Congrats on a working C64!
I had been Soldering and Desoldering chips and sockets for days one at a time (on this and my other C64). I actually desoldered the parts on autopilot, I was half way through the 4th one when I realized I had WANTED to do them one at a time!
great job!! you have a good prosses to figure these things out. keep up the great work😀
Thanks!
I can see the problem right away, you're missing a bunch of chips.
100% fantastic!
Thanks!
Ken it were possessed
It has been cleansed!
A couple issues I saw in your testing process: When you first tried the SID test with the harness, it was the SID with the black heat sinks. When you tested the SID in your known working computer, that SID had silver heatsinks on it. When you tested the computer with the "SID" issue the second time, you used the SID with black heatsinks again. IMO you should have tested it first with the known working (silver heatsinks) SID. You should have also tested the SID with black heat sinks in the known working computer. In hindsight, you know both SIDS work, but it would have made things less confusing and more certain had you tested both. The other issue is that NOT testing each time after replacing each individual socket was a mistake. You can theorize all you want, but you don't know for certain which socket was causing the issue. Yes, you have a working board now - CONGRATS! That said, for your own edification and learning, it would have been best to do a more thorough set of tests, by testing each individual socket before and after the replacement...
The working C64 has a different chip layout, the silver heat sink is the PLA. The SID chip spot on that board is above the PLA. On the non working board it is below the PLA. I had specifically use diffent color heat sinks on the PLA and SID so I would not get them mixed up as the boards I have have different chip positions.
@@CanadianRetroThings Good idea on the different colored heatsinks, as those 2 chips are virtually identical with the numbers on the top covered with the heatsinks. Another thing, "just-in-case" is to label or write the chip number on the bottom of the chip. That way you know for sure... Years ago I picked up a Dymo Labelwriter Pro. I absolutely LOVE this device. I make chip labels, 3.5 inch disk labels, 5 1/4" disk labels, etc... Labels are much easier to read after years of use, whereas permanent markers get covered up and disappear if cleaned with alcohol or component cleaners...
@@rdh2059I had also written on the bottom with permanent marker (only on the SID chip), the label maker is a great idea, I will do that. Thanks!