GE Microwave part needed

I've narrowed down an IC on my Smart board that I can't seem to locate, it's
marked TMS 2670 on the board itself, and it's a Texas Instruments, and has
these markings on it:

SS1450
M95151
MSHL 736

OR, I'm trying to locate the whole board, part number, on the GE site, it's:
SMART BOARD & DISPLAY 1655 WB27X5389

But at $149 plus shipping, that's a little too much.


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