Hi Rob

Just flying around today in my -7 (4500 and 3500 with 430W). Made one flawless RNAV approach coupled to TT autopilot. On way home, got a NO GPS warning on both EFIS screens. GPS function and signal were fine on the 430W. GPS signal going to TT autopilot and TT ADI standby were fine. Landed, shutdown, and rebooted everything and once 430W had a good signal, the AFS boxes were fine and all warnings were gone. Any ideas??

Doug Weiler