Zenith Z-170, Owner'S Manual, Page: 67 / 147

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ERROR: Timer interrupt failure!
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61
In Case
of Difficulty
This message indicates the timing logic on the CPU board may have failed.
Make sure the timer chip is properly seated.
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DISK ERROR: Drive not ready!
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DISK ERROR: Seek fai lure!
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These messages usually occur when you are attemping to boot an operating
system. The cause is usually an open drive door or the disk being impro­
perly inserted in the system.
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DISK ERROR: Bad disk control ler
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DISK ERROR: DMA overrun error 1
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Messages of this nature usually indicate a problem on the disk controller
board; however, they may also be caused by other defective boards in
the system. If any nonstandard boards have been installed, suspect these
boards first.
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DISK ERROR: Sector not found!
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DISK ERROR: CRC error!
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DISK ERROR: Inva l i d address mark detected!
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These messages indicate that an operating system was not found on the
selected drive disk, or that you have a defective drive. First try a different
disk. If this message occurs often, it may be necessary to have the drive
aligned or the disk controller board checked by a qualified individual.
No Error Message
Occasionally a problem may occur that prevents anything, including an
error message, from being displayed. If you are using a color RGB monitor,
check the j umpers on the video board. Also make sure you are allowing
enough time for any disk input/output problems to show up.