Function Buttons - Philips Avalon CTS M2720A Service Manual

Troubleshooting the Top Cover 7 Troubleshooting
If after opening the top cover, or following a repair, the display, all lamps, and all function buttons fail to
work, check the ribbon cable connection to the MIF board.
The top cover contains the following items:
• Charge/communication contacts (see "Checking Contacts" on page 65)

• Function buttons

• Display/window
• LEDs
• Magnets
Function Buttons
If any of the buttons fail to function, reset the system (see "System Reset" on page 61). If an individual
button fails to work, try to solve the problem by renewing the top cover (see "Removing the Top Cover
Assembly" on page 20 and "Replacing the Top Cover Assembly" on page 21). If all the function buttons
fail to work, then this is likely to be a MIF board malfunction, a repair being effected by exchanging the
base station.
77