from your remote, please check the following:
Check that the batteries in your original remote control are fresh.
Occasionally weak or used-up batteries in the original remote control might still
have enough power in for it to work with the device it is controlling, but not
enough to programme the Sonic Screwdriver.
Try varying the distance between the tip of the Sonic Screwdriver and the front
of your remote during learning. Normally about 3 cm (1.5”) works best, but also
try at 5cm (2”) or 1 cm (0.5”).
Try varying the duration of the button press on your original remote
control.
Only a very short press is usually required. If you think you might be pressing
the button for too long then reduce the press time. In some cases increasing the
press time slightly up to about 0.5 seconds can help.
Check that your original remote isn’t an radio frequency remote control.
The Sonic Screwdriver is designed to work with almost all infrared remote
controls but it will not work with radio frequency (RF) remotes. If your remote
control works through walls (i.e. from another room), or can work even if the
device you are controlling is hidden inside a cupboard or behind some furniture,
then it is likely that it is an RF remote control. To test if your original remote
control is RF, block the front of the remote with a cushion while trying to control
the device it is used with. If it can still control it, then it is an RF remote control
and the Sonic Screwdriver will not be able to learn its remote control codes.
Check that your cable or satellite box isn’t switched to RF remote control
mode.
Some cable or satellite set-top boxes are able to be controlled by either infrared
(IR) or radio frequency (RF). In this case make sure that your set-top box is
switched to IR remote control.
26 The Sonic Screwdriver can change channel on my TV once, but repeated
commands don't seem to work
There are a few TVs (and other devices) which use infra-red (IR) "toggle codes" -
these alternate between two different codes each time you press the button on
your normal remote control. This is intended to avoid multiple commands being
executed accidentally if the IR beam is broken during transmission (for example
by the cat or another person walking between the remote control and the TV).
So, the first time you press the "channel up" button (for example, though this
may also applies to other buttons), it will send one IR code (let's call it "code A",
which will repeat for as long as you hold the button down), but the next time you
press the same button, it will send a second IR code (B). On the third press, you'll
be back to the first code A again, and so on. The TV will action a channel change
when it sees code A, but it won't change the channel again if another code A is
received consecutively, but is instead waiting to receive code B before it'll
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