Ok then , as I said , I did not expect much out of that but it had to be tried.
Now about that code 23 and horizontal deflection failure , this could point to a number of things ;
The horizontal drive circuit could have failed , horizontal output and flyback ( high voltage transformer) , pincushion /deflection amp etc. etc.
Really this will require some serious troubleshooting and definitely not what I would call a do it yourself type of job unless you are the proud owner of a tv repair shop.
Another problem could be finding the parts for it due to its age , some parts are still available I`m sure but a very good suspect in this case could be the high voltage transformer for example and that could prove to be difficult to find.
Depending on the parts , I would say that you may be looking at $300+ to have this repaired at home.
If i may be frank , considering the age of the tv and the fact that you can get a new 60" plasma tv
with all the bells and whistles for around or less than $600 or $700 ,I would think twice before investing that kind of money into this one.
Still , If you go for the repair shop option then look at the links below and enter your zip code ;
Or this one;
This will give you a list of repair shops in your area.
You could give a call to different shops in your area to get an idea of their rates , it pays to shop around.
Wish i had better news and an easier solution for you today ,like some sort of reset but this is not the case i`m afraid .
Hope this help and I will be in standby if you have any questions.
Thank you and please take the time to rate my answer if that answers your question and you can still reach me here at anytime after this chat is rated if you have other questions.
Please note that from where i`m sitting there is just so much that i can do and if you are going to rate my answer below O.K service then please do not rate at all , just let me know.