I talked to the vendor (LapZone) that sold me the Quanta LCD screen. They insist that the Quanta screen is a direct replacement for the IBM original.
They are WRONG, and their mistake has cost you the LCD controller chip on your T43's motherboard.
See these posts, and the links to other posts off of them (esp. the second one...pics of the chip in question):
Some LCDs have subtle differences in pinout between closely-related models (for example, Samsung LTN141P4-L02 [IBM] vs. LTN141P4-L01 [Non-IBM], or IDTech IASX16S [IBM] vs. IASX16C [Non-IBM]), and based on other peoples' experiences using the non-IBM versions of these displays, even though the connector on the end of the ribbon cable will physically mate to the screen does NOT mean that it will work.
In fact, as you can see from reading some of the above posts, plugging in a non-IBM LCD into a ThinkPad actually causes irreversible damage
to a component on the mainboard (LCD controller chip). This is why your computer will not boot unless it has an external display it can default to. It won't matter whether you get the correct LCD replacement now because the motherboard is toast and will need to be replaced (unless you have a place that you can source the controller chip from and are REALLY handy with a soldering iron!).
In your case, it wasn't even a matter of whether you got sent the correct "version" of a supported display; Quanta was NEVER an LCD vendor for IBM/Lenovo. You can verify this yourself by downloading the Hardware Maintenance Manual for the T43 and looking at the FRU list. Looking up your model number (2668-W12) tells me that you have a 14" T43; you can see the parts list information for 14" LCDs here:
http://www-307.ibm.com/pc/support/site. ... 58431.html
Note that for the 14" SXGA+ screen on the T43, the only vendors mentioned are BoE-Hydis and Samsung. Quanta is nowhere to be found, and I've never heard of a single T4x or T6x model ever shipping with a Quanta screen.
The guys at the place you bought your screen from are incompetent morons, I'm afraid. I would take this problem back to them and make it their
problem. Hopefully they will do the responsible/honorable thing and make it right.
For future do-it-yourself LCD replacement projects, unless the computer is one you are willing to sacrifice for the sake of science
, I would make a point of only purchasing LCDs with an IBM FRU sticker on them (although it is
possible to get lucky sometimes