The service manuel is very helpful, we where able to restore the device to its working operation again.
Text excerpt from page 23 (click to view)
Level 1 and 2 Service Manual
Disassembly
3.
Lift the transceiver board assembly out of the front housing. See Figure 7.
Figure 7. Removing the transceiver PC board assembly 4. To replace, insert the transceiver board assembly into the front housing with the flex connector on top.
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Be sure the side buttons are correctly positioned in relation to the corresponding switches on the transceiver board. Verify operation of the buttons after replacing the transceiver board and rear chassis assembly. 5. 6. Insert the flex connector squarely into its mating connector on the transceiver board and press firmly until it snaps into place. Replace the rear housing, SIM card, stylus, battery, and battery cover as described in the procedures.
