Walker set top box - ITV etc was gone and reset gone pearshaped

No experience with a Walker, but, in general, boxes come with a predefined list of transponders and parameters - this will become out of date as things are changed by the satellite operator. So just doing a retune will not help you in those circumstances.

You need to do a Network Scan or a Blind Scan to find new transponders/parameters. I can't give you specific instructions for this, but it should be there in the menu somewhere.

Or alternatively manually add the new transponders and parameters - which would be tedious if you haven't done it before.

The third option is to import a SATCODX file from somebody who has already done the work for you.

HTH

I have used a number of Walker boxes over the years and it is often best when doing a scan to download all encrypted and unencrypted and sort from there. The likes of C4, more4, e4, are fta but come up in the encrypted list, it may be the same with your choice. Going this way will give you a huge job deleting and sorting, so it might be best to just scan the frequencies you want.

Have you considered if there's a problem with your satellite dish rather than the set-top box? Disappearing channels over time is consistent with a defective or deteriorating LNB.

I have a Walker WPSTBW23 currently.

I can see if you click on Home on the remote, the Settings, Installation, Manual Channel Scan, you can choose Satellite search.

The you can enter the "frequency", "polarisation", "symbol rate". And the Satelitte is listed below. e.g Astra 2 28.2E (this can be changed in another menu option).

I've tried inputting frequency and symbol rate for channels with irish info online, but havent found the ones I was supposed to be seeing,

You won't get Irish/ Saorview in the satellite settings, it will be scrambled. The Irish channels will be in the terrestrial settings through your aerial rather than the dish.

Hi all , joined boards to get just this help.
can I ask a question…. ex sky q customer. Plugged in the satellite cable. Followed the first installation instructions and loaded the preset channels…. Got nothing ! 
re attempted first installation steps, this time manual scanned channels, picked up itv, ch4, bbc south, and a couple of the U+drama etc, but not tuned in the multiple channels indicated .

I’ve followed the list shared above , and attempted to manually scan frequencies for the channels, getting channel not found error 😩

Any suggestions on how to resolve this for a non techie that can’t afford to stay with sky!

Thanks .

Doing a manual scan can be tedious if you want to tune in all the free to air channels, you have to do each transponders and there are many of them, best to do a blind scan, that option should be available, and scan for encrypted and unencrypted as the likes of C4, e4, etc come up as encrypted for some reason on the Walker box. The down side is that you will end up with a load of unwanted channels and some duplicates but you can delete the ones you don't want and put the remainder in your own order. On earlier Walker boxes there was a SatFree option which mirrored Freesat and put the channels in a reasonable order.

You are right, it wasn’t a manual scan that I did, again beyond my skills. Im using the wrong terminology!
I used the manual set up option for installation which is the blind scan you describe, it captured the few channels to tune. thanks for that.