You aren't obligated to any future subscription.
Unfortunately in cases such as this I'm limited to diagnosing and explaining the problem and giving you practical advise for how to proceed. Ie: a new tuner at a fraction of the cost of a new tv.
We've done all the troubleshooting possible and a hardware failure within the tv (as it is not responsive to the specific reset process for this model) is outside of anyone's control.
I am an independent technician and I've spent my personal time, unpaid, in an effort to assist with the question for which you solicited my services. This site works on the honor system, and to that end, I have prioritized working with you ahead of other paying customers.
Although you’ve already paid your fee to the site, I am only compensated for my efforts when customers such as yourself leave positive feedback for my work. I apologize this is not the outcome you had hoped for, though this is really beyond either of our control. I do hope you’ll consider leaving a 5 star rating for me, rather than “shoot the messenger”, so that I may get credit for my time spent in good faith to answer your question accurately. Rating 1 or 2, or not rating at all, does not produce a refund, it only penalizes me for trying to help.
Asking for a refund at this point has the effect of me having to work for free for all of my time spent in good faith helping you.