T410 Upgrade from WXGA -> WXGA+ Failed

[Ascolti]

Hi All, Advise would be welcome. I upgraded my T410 display from the LTN131AT15 (WXGA) display to a LTN141BT09 (WXGA+) after finding several posts about how this is entirely possible.

However, despite a brighter clearer image (which is always nice) the display remains fixed at the 1280x800 display limit.

My T410 is the i5-520m model with integrated graphics although this was previously described as not being an issue. The BIOS is the latest 1.45. Machine type is 2522AC1

Any advice of information would be welcome. Many thanks in advance.