Apple Mac 5260/100 - Manual (Page 63)

Troubleshooting Symptom Charts/Hard Drive - 18
Flashing ? appears at
startup in 5260/
100 with 1.6 GB ATA
hard drive (p/n
661-1107), and may
be corrected with
restart.
1 Be sure system software is not corrupted. See the Software
Troubleshooting document in the HW-SW Procedures topic
under the Troubleshooting tab on the Service Source CD
startup screen.
2 Remove the 1.6 GB ATA hard drive and look at the serial
number on the bar code label.
3 If serial number is within range XXX 6099 XXXXX to
XXX 6131 XXXXX, replace hard drive.