HD52W67 ITC222A Power On error codes

I'm retired on a fixed income and need to find out if it's worth fixing, I've presumed it isn't.
Short story, quick question is... is there a list of error codes available for this television?

Here's the long story, with every detail I can think of, if anyone with knowledge is willing to plow through it...

All of this happened about a year ago. To my best recollection...
The RCA television above had been used for approximately 18 months, daily, including frequently with computer through DVI connection for primarily downloaded videos. I did play flight simulator on it, but hadn't for over a year before the failure The television was used at the native 1080i resolution as ws the computer's video card.
The video card failed on the computer. The computer was not actively feeding the television but the DVI cable was physically connected.The card did smell burnt but was not visibly altered in any way. There was zero damage to the computer's mother board or its Sony monitor.
The television continued to work for several days, maybe a week, don't remember.
I had physically of course disconnected the DVI cable from the video card at the time of the card failure.
A few days later, an Error Message and some code came up, but by the time I realized what the bleep was going on, the message was gone, I hadn't written it down, the lamps were out and I've never gotten them to light since then.
The power light comes on the front panel of the tv comes on any time the power is connected. It does not blink, it stays on constantly. The front panel power button does work, as does the remote control power button.
I've had it disconnected for months between attempts at this point, but nothing changes, and the front panel power button lights the isntant I plug it in, but no picture.
There is no click when plugging in, but there is an audible click when buttons on remote are pushed. Tv does turn off and on with both front panel and remote power buttons.
The power button flickers rapidly with any button press on the remote control.
Reading of flyback transformer failures here, I have removed the back panel (out of warranty), and there is no smell and no visible signs of anything fried. The flyback visibly is as new.
I keep hoping it just needs a memory reset or something... but have seen no mention anywhere of that being possible.
Even the error codes might help, I think if I saw them listed I'd remember which one it was. It mentioned the DVI port, but I don't remember the rest.
Sorry for the novel length post, but I've tried to anticipate the relevant questions and issues.