Apple 5420/180 Manuel D’Utilisation
![Apple](https://files.manualsbrain.com/attachments/2c022a7d1a76dcd8f02c04aa8d97faf41b63902f/common/fit/150/50/8a691e9df6162751590e2cef93a951cf3a39c94b6949421016232655b22d/brand_logo.png)
Troubleshooting
Symptom Charts/System - 4
System will not start
up from keyboard, but
will start up from rear
power switch
1 Verify keyboard as known-good.
2 Replace analog board.
System continually
restarts after
Shutdown from
Special menu
1 Verify keyboard as known-good.
2 Replace analog board.
Menu bar constantly
flashes or system
constantly beeps
1 Verify that front-panel control buttons are not jammed.
2 Verify “mute” is not selected in the Sound control panel.
3 Reseat drive bezel and front-panel control board.