You can only find the codes that are in there. If you have used Auto search, then you Have found all the codes there are.. It goes through them sequencially. Universal remotes are not perfect.
Here is a link to a place that has the original remote available at a very good price..
I wish there was a better answer, but the right remote will work perfectly where you have already found out that the universal remote only works 95% right.
I really was trying to help.
The vast majority of people do not know that remotes for discontinued TV mode;s are even still available. Even then, if they do find them say from the original manufacturer, the end up paying $60 or $70 so they are very greatful for being abloe to find an original remote so cheaply.
Here is the owners manual for The Sylvania TV that you have (which you do not have yet).
Please do not kill the messenger. You can not make a remote that does not have all the correct codes do all the functions. It is possible SOME universal remotes will perform the actions you desire. But, if the codes are not inside the remote, we can not put them in.
Are you Kidding Me?
You needed an answer on Saturday??
You did not even Ask the question until Tuesday..
I answered your Question 8 minutes later.
You did not even respond to my Answer until 3 Days 7 hours later..
My answer was NOT that there was no answer..
My answer was here is the ONLY way that you can switch inputs without the remote control.
My answer was a very informative You Can NOT Do what you are trying to do the way you are trying to do it.
Most clients would appreciate knowing this so they can not Beat their head against a rock wasting any more time trying.
Sometimes I have to answer questions like. I dropped my cell phone in a glass of beer 3 days ago and After I tried to turn it on, it came on for 3 seconds then the screen froze and it stopped working..
HOW do I make myy cell phone work again..?
It is my job to tell them that THEY are likely Never to make it work again and they really should not spend any money even trying..
This in your words would also be answering a question where there is NO answer.
But the answer is, don't waste ANY money trying because it is not worth it.
The answer is YOU can not..
I am sorry that your vacation was spoiled by not being able to watch TV. BUT, I gave you THE correct Answer.