13 August 2004, 13:17 | #1 |
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Already dead A1200
Rather than killing my own machine, I decided to do something different and bought an already dead a1200 My intention is to fix my other 1200 that doesn't accept hard drives, using the parts of this new one.
But I this one is showing signs of life. When turned on, power led works, it checks the hard drive for a moment but doesn't display any image and remains silent. After stripping the motherboard off, I noticed that it was very dusty and edges of the board are a bit worn but there is no visible damage on the buses. What might be the problem of this one? |
13 August 2004, 14:00 | #2 |
Commodore Collector
Join Date: Aug 2001
Location: Austria
Age: 53
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Since it checks the hd it seems it is working but has problems accessing the hd. If there was a serious hardware problem it wouldn't get that far !
I would suggest first disconnect every additional hardware like harddisk or turbocard etc. Then check the Amiga with all 3 different signal outputs. ( RGB, Video, RF ) Also try holding down both mousbuttons on startup. This should bring up the startmenu. |
13 August 2004, 14:09 | #3 |
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I removed everything and am trying to get the bare board working. Monitor or TV doesn't display anything but I can see the usual "power on flicker" when it is turned on. Start menu doesn't appear and reboot keys don't do anything although caps lock light turns on/off fine.
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13 August 2004, 15:34 | #4 | |
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Quote:
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13 August 2004, 16:40 | #5 |
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I'm sorry Ctrl+A+A blinks the caps lock once and this must mean a successful reset but I'd expect the power led to dim for a moment when restarting. This doesn't happen. Still, I can confirm the machine resets with keys.
Keyboard problems aren't the issue however. As I said, the bare board has the problem with nothing connected. |
13 August 2004, 16:54 | #6 |
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Floppy drive doesn't show any sign of life unless I accidentally connect it's cable the wrong way
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20 August 2004, 16:36 | #7 |
Commodore Collector
Join Date: Aug 2001
Location: Austria
Age: 53
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Probably a CIA damage.
These SMD A-1200s boards are harder to repair than the old A-500 which had every chip socketed I even have one A-1200 board that works but doesn't display any screen ( drive, sound and everything else works ok, though ) |
20 August 2004, 18:56 | #8 |
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Thanks for the tip, I think it's still good enough to fix my other board with.
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