Network/Signal Problems - Sony Ericsson K770 Troubleshooting Manual

3 Network/Signal Problems

Problem Area Items to Check
Before proceeding !
No Signal or Poor
Signal
Visually inspect SIM holder
Visually inspect antenna contact pads
4/000 21-1/FEA 209 544/142 A
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Company Internal Sony Ericsson Mobile Communications AB
Trouble Shooting Guide, Mechanical
Repair Action
Perform a flash upgrade.
•
If dirty or oxidized – Clean it.
•
If damaged – Replace the M2 SIM
assembly.
•
If dirty or oxidized – Clean the pads
and replace the Antenna box.
Reference Image
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