Do, not ever reset those QA02 eeprom on those models that is "TNxxxxx"
models.
It is a bug in these models, ruins the EEPROM contents and requires
new pre-programmed IC.

Boy I was ****ed when I finally found out on google. Even toshiba
didn't warn me about it either even we inquired. Toshiba did have
several bulletins but we would have to ask for them because we don't
work for Toshiba but can get parts.

I did recall that there was another bug on eariler Toshiba models I
think, 55A50 not sure but it is like that, if you roll over from end
to beginning of perameters, several settings get changed.

I have not seen like this kind of firmware bugs idiocity Toshiba is
doing compared to other brands even JVC, Thomson, Samsung. If these
discovered a bug, they send out bulletins and provide new part numbers
with revisved firmware, Toshiba, hard to see.

Done with ranting; I have question:

I have a TN50X81 that needs a QA02 eeprom and I need identifying
correct EEPROM part number based on certain range of serial number
according to bulletin (found it on google). I have is 6399155529 s/n.
The bulletin refers to later models.

Thanks & Cheers, Wizard