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From: sytang@lamar.ColoState.EDU (Shoou-yu tang)
Newsgroups: comp.sys.atari.st.tech
Subject: Need help with bad RS232 port
Keywords: hardware, RS232
Message-ID: <14371@ccncsu.ColoState.EDU>
Date: 20 Apr 91 17:04:52 GMT
Sender: news@ccncsu.ColoState.EDU
Reply-To: sytang@lamar.ColoState.EDU (Shoou-yu tang)
Organization: Colorado State University, Fort Collins, CO  80523
Lines: 13


 Hello:
 My 1040ST has a bad RS232 port and I'm trying to fix it, when nothing connected
 to the RS232 port it works fine. But when a working modem connected to the port
 the screen on the mono monitor got distored in some part. And the Uniterm would
 hung up the whole machine when try to dail out. 
 (NOTE: Uniterm and modem are working correct and has try with another ST with
 exact same configuration).
 Is it the 1488 or 1489 went bad? OR the Sound chip? Any hints?
 Thanks
 Tang
 sytang@lamar.colostate.edu