Apple macintosh ii.iix.iifx 服务手册
![Apple](https://files.manualsbrain.com/attachments/2c022a7d1a76dcd8f02c04aa8d97faf41b63902f/common/fit/150/50/8a691e9df6162751590e2cef93a951cf3a39c94b6949421016232655b22d/brand_logo.png)
Troubleshooting
Symptom Charts/Error Chord - 2
Symptom Charts
Error Chord
Error chord sounds
during startup
sequence
1 Perform SIMM verification on customer’s logic board.
Replace Apple-labeled SIMMs manufactured by NEC that have
date code of 9052 or below.
2 Replace logic board. Retain customer’s SIMMs.