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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Hardware flakiness (Windoze BSOD)
So I made up a SCSI cable for the scanner I got off the street
(literally), an Agfa SnapScan 1236. (Had to cobble up the cable since my SCSI host adapter has a high-density socket but the scanner has the old 25-pin socket.) The cable's a bit ugly, with something of a rat's nest of wires soldered together in the middle, but it works. Scanner works fine. But since using the scanner, I've found that sometimes--not always--the scanner seems to be causing a hardware fault that causes Windows blue screens. Sometimes I can boot up and do dozens of scans; other times the BSOD appears some time after booting, or when I access the scanner driver. At first I wasn't sure whether the blue screens were due to the scanner itself or the scanner driver, but I'm pretty sure it's the former, as I never get them when I unplug the scanner. I'm sure part of the problem can be traced to Windows 2000's rather ****-poor SCSI handling. While it is definitely better than Windows NT, which *really* sucked in that way, it's still problematic. And the fact that I don't have a terminator on the scanner might not be helping, either. But as I said, when it works I can do many scans with no problems. I should say that this isn't a critical problem for me. I have another scanner that works about as well (a Microtek using USB) that works about as well; the Agfa just happens to be a bit faster and not as annoyingly noisy. I'm mainly curious why I'm having these problems. Any guesses? (Educated ones get more points.) Oh, almost forgot: o OS: Windows 2000, SP 2 o Advansys SCSI host adapter ("fast/wide"), but I'm using regular old single-ended SCSI II. The Advansys is basically a clone of the old Adaptec 1542, but with two adapters (16 SCSI IDs) on one card. There are two CD-ROM drives (Plextor) on the same bus as the scanner. o Motherboard is an Asus something-or-other, almost 10 years old -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
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