you left out 2 facts when DID it last work ok on this LT.
never, last year , 2008 or what, my guess NEVER !
no OS stated, W7? what? and MUST MATCH !!! drivers !!!
facts the product is 100% dead now at HP, no support at all . period
they will just quip "legacy" sorry..
you have the wrong dock.
here is the old data sheet it tell you only these PC work
and Compaq Presario
this is what you have.
shows xp last supported OS back then then.2008
more lots more, you can search at HP all day but
NO OS STATED BY YOU
and why you think your PC runs on this X
the last post at HP said
HP 15-r264dx does not have docking port, you have to use USB "dock" such as HP USB 2.0 or USB 3.0 docking stations.
and last here is your correct docking station (you never asked first)
KN745AA - HP Notebook QuickDock
so let me guess the real story
i found this docking station at a garage sale for $5
what does it FIT
answer, see link 2 above , PDF for the data sheet,
ever like just google ?
here is 1 hit, found the service guide. 2006(11 years old)
page 6 shows it dont work on your PC.
so that 2 books that said that.
if does not mention OS, but 2006 we know is XP , never run XP ever.
there are rumors of hacks that can make it work but only no details.
for sure it must be a hardware match.
then you need drivers to run it, but if your OS is not XP
finding them now is very very hard.
only google can find them and I see ZERO