From a cold start,power on,screen is all blue with "no signal" in the upper right corner. while still in blue screen mode approx 2 minutes after start a squealing sound starts. about 1 minute later the screen changes to black. approx a minute later the squeal changes to a static sound. within 30 seconds the picture appears in a flashing on and off alternating with a staticy screen.then within a minute the picture is fulltime with some horizontal graininess for a few minutes. during the "warm up" time the squeal and static sounds are not controled by the volume buttons.

That sounds like a power issue. Either your power supply or motherboard is having a problem distriubuting voltage to your computer.

with the blue screen do you see any kind of error message or any blink code?

if so we can solve the error very easily

Holding the satellite signal strength indicator icon (upper left hand corner of screen) for a few seconds with your finger brings up a visual display showing signal strength of various satellites, accuracy, speed and elevation.

From a cold start - I too have experienced 2 to 3 minute wait times for satellite aquisition, so I would presume this is a normal. I own three different Garmin units apart from the 765T and satellite aquisition times vary on all three, most aquire satellites in under 4 minutes. Traffic on the other hand seems to take a while to load as this is dependent on availability in your area.

Press the AV button on the remote, it will alter the interface with your receicevr. It will automatically pick your receiver if it is sending signal properly. If this doesnt work try another tv on your signal box to see if you get the same problem. Bet its the AV button though. Best of luck dave.

Most likely you can adjust it in the Service Alignment Mode (SAM).

Press 062596 followed by the STATUS button (upper left). Navigate to "White Tone", press the right key to enter and select "Normal" mode. Set the colors:

Red = 135, Green = 128, Blue = 133.

The "Cool" and "Warm" menus are deltas from the "Normal" settings:

COOL: R -3, G -1, B 5
WARM: R 2, G -3, B -13

Press the "MENU" button to return to the main menu, then the "Power" button to turn the TV off.

Hi...there,
Well... after 3yrs of used, it's time to retired. You've got a busted panel...

damm i have the same issue except the left side of the screen is far darker than the right. It still works but is very noticable. If you get this resolved please reply back!

Does it do this on any other of its various inputs?
It is indicating that the signal is weak and we need to varify if it is just this one (whatever you currently have it hooked to).

Air 2 is the source it's looking at for a signal - - where is the signal plugged into? and are you able to change the input or source to look at another?
Bill