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Article #20106

Dead floppy drive after motherboard fire...

#20106
From: Douglas C Ling
Date: Tue, 26 Jan 1993 18:13
23 lines
1557 bytes
I salvaged most of the functions after I replaced an EXPLODED capacitor. But
I cannot get the floppy drives to function.

I have a ST02 SCSI adapter controling two hard drives and two floppies. I 
have replaced the dead I/O card with an IDE-fDD/IO card (with the hard disk
controls disabled). I have tested, in another machine that:
   - the floppy drives work
   - the SCSI's floppy functions do not
I have also used my scanner to test out IRQ 3-7 to be operative.

The floppy drives, under either IDE or SCSI control, will power up and spin
up but I would get "drive not ready" errors if I do a simple "DIR".  

All other functions seem to be normal - except I notice just now that the
real time clock would run slow if I turn the machine off(? This is unconfirmed)
Anyway, I am wondering where I may next look for signs of damage on the mother
board: near the ROM BIOS (where floppy control functions lie, true?), or where?

I may have to get a new motherboard - at least my CPU and the SRAMs are OK.

Any suggestions would be appreciated.

Doug
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Message-ID: <1993Jan26.181337.21021@athena.mit.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!enterpoop.mit.edu!senator-bedfellow.mit.edu!bloom-picayune.mit.edu!athena.mit.edu!dcling

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From: dcling@athena.mit.edu (Douglas C Ling)
Subject: Dead floppy drive after motherboard fire...
Message-ID: <1993Jan26.181337.21021@athena.mit.edu>
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Organization: Massachusetts Institute of Technology
Date: Tue, 26 Jan 1993 18:13:37 GMT
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