Assuming you meant to type even/odd.
And also assuming you are only using one bird.

In checking order
Check cable connections for ANY corrosion.
Check for bad cable
Check for bad LNB
Check for bad switch (if applicable).
Check for defective receiver.

What you have to look for is that the receiver changes the voltage sent to
the LNB, this should change between (approx) 13 volts, and 18 volts as you
go from even to odd.

It is unlikely that your problem is caused by the aim being off. but never
hurts to check



"Eric Desrochers" <dero72@mac.com> wrote in message
news:1huk1j3.hxct6d1575eeaN%dero72@mac.com...
> Hello! 3100 receiver here with regular subscription. Begining
> yesterday, I have about half the channels OK and the other half looking
> for a sat signal. Uppon closer inspection, it turns out only the even
> numbered transponders are "gone". The even ones have near 100% signal.
>
> Anyone know what may be causing this? The only thing I can see is the
> strong winds we are experiencing now, but if the antenna is out of
> alignment, why half the channels are still strong?
>
> Thanks!
>
> --
> Eric (Dero) Desrochers
> http://homepage.mac.com/dero72
>
> " Hiroshima 45, Tchernobyl 86, Windows 95 "