Microsoft KB Archive/31052

If MACH 20 Does Not Boot, Check Disk Drive Status PSS ID Number: Q31052 Article last modified on 11-22-1994 PSS database name: HARDWARE

1.00 MS-DOS

= SUMMARY =

If MACH 20 will not boot correctly, check the status of the disk drives. If the drives are spinning, see the section titled “Drives Spinning” below. If the drives are not spinning, do the following:

Drives Not Spinning

 * 1) Check the ribbon cable for bent pins or incorrect alignment.
 * 2) Check the jumper settings. The MACH 20 should be at 521 and the Memory Plus “C” jumper should be against the table in the manual and system memory.
 * 3) Check the 8087 blanking plug; it should be installed. If MACH 20 continues to boot incorrectly, do the following:
 * 4) Disable caching and try to boot again.
 * 5) If this procedure works correctly, use the hotkeys to enable caching once the machine boots. If the problem continues, do the following:
 * 6) If Memory Plus is installed, try using MACH 20 without Memory Plus.
 * 7) If Disk Plus is installed, try using MACH 20 without Disk Plus (that is, reinstall the previous disk controller card). With these additional boards, MACH 20 may be having I/O conflicts with other boards in the system.
 * 8) Change the address of the Memory Plus 8,4,2,1 jumpers or the Disk Plus jumpers.

Drives Spinning

 * 1) Check the 521 jumpers on the MACH 20 and the Memory Plus C jumper.
 * 2) Boot from a floppy disk that contains no CONFIG.SYS or AUTOEXEC.BAT. If this procedure works correctly, add programs one by one to CONFIG.SYS and AUTOEXEC.BAT to determine which program fails.
 * 3) Remove Memory Plus and Disk Plus from the system one at a time. If MACH 20 works correctly with one of these removed, change the jumpers on the Memory Plus or Disk Plus (depending on which one is conflicting) to allow for different addressing.

If the above procedure does not correct the problem, verify that the memory switches on the motherboard are set correctly. For more information on motherboard switch settings, consult the technical reference that came with your MACH 20 board.

KBCategory: kbhw kbtshoot KBSubcategory: Additional reference words: 1.00 noupd doesn’t work won’t start tshoot

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================================================================ Copyright Microsoft Corporation 1994.