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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: spaceman88 on November 28, 2010, 01:03:58 PM

Title: 1084s plugged into Serial port
Post by: spaceman88 on November 28, 2010, 01:03:58 PM
Yes, you read that correctly. I plugged my monitor into my A2000 serial port (didn't have my glasses). Now it will boot off a floppy, but not the SCSI drive on the GVP card inside. I had used the A2000 about 3 weeks ago and every thing was fine. Do you think I burnt something out or was this just a random failure?
Title: Re: 1084s plugged into Serial port
Post by: Jiffy on November 28, 2010, 01:54:02 PM
Quote from: spaceman88;594987
Yes, you read that correctly. I plugged my monitor into my A2000 serial port (didn't have my glasses). Now it will boot off a floppy, but not the SCSI drive on the GVP card inside. I had used the A2000 about 3 weeks ago and every thing was fine. Do you think I burnt something out or was this just a random failure?


You might have fried one of the CIA-chips. Swap them out (your Amiga has two) to see if the error changes. If it does, you know for sure your CIA is fried. Replace it with a working one, presto.

As the CIAs are socketed in your A2000, this is a very easy and cheap repair. No soldering required, just pop out the defective chip and carefully put in a working one, done.
Title: Re: 1084s plugged into Serial port
Post by: Merc on November 28, 2010, 03:12:57 PM
You might want to check the pins on the serial port too, IIRC the RGB connector is 23-pin so the extra pins in the serial connector might have been bent and might be shorting to something else.
Title: Re: 1084s plugged into Serial port
Post by: spaceman88 on November 29, 2010, 10:48:00 PM
Quote from: Jiffy;594991
You might have fried one of the CIA-chips. Swap them out (your Amiga has two) to see if the error changes. If it does, you know for sure your CIA is fried. Replace it with a working one, presto.

As the CIAs are socketed in your A2000, this is a very easy and cheap repair. No soldering required, just pop out the defective chip and carefully put in a working one, done.


Hi, I took the CIA chips out of another 2000 board that was destroyed by a leaking battery and it fixed the problem. I also checked the serial port, it has two more pins than the video port, but somehow I didn't bend them over. Thanks for the help.