| |
Paulko64
Registered: Jul 2010
Posts: 24 |
strange c64 behavior...
Hello,
I'm not sure this is the correct place to ask, but I'll just try...
Sometime ago my c64 breadbin didn't come up again after power-on. It only gave me a black screen. Looking at different discussions regarding black screens, I swapped out the PLA with a working one from one of my other breadbins. It still wouldn't work. The powersupply I have does work with about 3 other c64s, however since they all have other issues (bad SID, bad VIC VSP behavior, etc) I'd like to still use my original one.
Now the strange thing is that after about 3 times switching on/off the correct blue screen comes on. Everything works! Even if I now switch it on/off it keeps running. Only if I turn it off for a day or so, I need to restart it a couple of times before it comes up.
Any idea what is going-on here?
Thanks,
PaulKo64 |
|
| |
TWW
Registered: Jul 2009
Posts: 545 |
Since your commie is working after a little jiggeling with the switch, could it be the switch?
Or could it be the capacitors which needs some warm-up time? |
| |
MaD ][
Registered: Sep 2004
Posts: 23 |
It could be as simply as a faulty PSU as well as a bad voltage regulator... it might be even some (one or more) dead Capacitor/s as well as some loose welds or interrupted trace/s...
Troubleshooting those kind of weird behaviour can be very time consuming, you need to double-check everyting. You need to closely inspect both pcb sides to ensure that everything's ok! ...not for the faint of heart in some cases...
I can be as simple as changing PSU with a working one (..if you know how to do it you can always adapt/rewire any spare PeeCee PSUs to build your heavy duty C64-PSU, just ensure you get a safe psu BEFORE powering it on!!!).
Everyone's has its own troubleshooting step-by-step procedure depending on experience... if you're afraid to pick up your soldering iron to remove some ICs you'd better leave it to someone else to do the work for you.
My personal advice is to find another working breadbin to replace your faulty one (faster, safer, cheaper...and, hey! you get some spare parts for free from your old C64 board!).
check:
http://personalpages.tds.net/~rcarlsen/
http://www.devili.iki.fi/Computers/Commodore/C64/Service_Manual/
http://www.commodore.ca/manuals/Tips/c64_tips.htm
or try to find the book: "Troubleshooting & Repairing your Commodore 64" by Tab Books |
| |
SIDWAVE
Account closed
Registered: Apr 2002
Posts: 2238 |
you dont need a psu
if you believe that the c64 can work without any psu connected, it will work.
my wireless mouse is running with no batteries.
it has blinked "batteries near empty" for over 6 months now, so i started to believe, and the result is that it dont need batteries, because its all a mind trick :D |
| |
Stainless Steel
Registered: Mar 2003
Posts: 966 |
Hell, then you probably dont even need a C64! Its all in your mind! :-D |
| |
GT
Account closed
Registered: Sep 2008
Posts: 308 |
LOL. Thought this thread was about strange behaviours of sceners. |
| |
Intensity
Account closed
Registered: May 2002
Posts: 337 |
haha me too! Hey Geir, I laughed heaps on X because of you hehe! Can I rent you for parties? :D |
| |
GT
Account closed
Registered: Sep 2008
Posts: 308 |
Quote: haha me too! Hey Geir, I laughed heaps on X because of you hehe! Can I rent you for parties? :D
Hey Intensity, nice to meet you at X.
If that tribe leader in the Madagascar movie was at X, he would've said something in the lines of: "I like to copy party. I like to copy party. I like to copy party. . . . PARTY!". Hehe. :) |
