So, this is a bit of a thread resurrection, but I was delighted to have stumbled on this information while looking at upgrade options the last few days. Initially I was simply looking at upgrading my Probook 450 G1 screen - an LP156WH3-TLT2 - from 1366x768 to 1920x1080, but realised that I might just be able to upgrade from TN technology to an IPS screen for better viewing angles and improved colour rendition!
After almost a day of searching Ebay/Amazon etc. for an LP156WF4-SLC1 display, I have come to the conclusion that they only exist in China at this point, and I don't fancy waiting for at least two weeks to receive a possibly counterfeit item, or simply being scammed outright!
So, I have just bought a second-hand LP156WF4-SLBA off Ebay, along with the Probook 470 cable kit (HP part 723646-001), to test the theory... It'll be a week or so until I get the parts and can fit them, but hopefully I'll be able to feedback here, for posterity(!)
I have made some observations about the model code, which may be helpful to others, eg. LP156WF4-SLC1 breaks down into:
LP = LG Philips
156 = 15.6" diagonal screen
WF = full HD (1920x1080)
4 = ?
S = IPS (T = TN)
L = 40-pin LVDS (whereas P = 30-pin eDP)
C = mounting lugs top and bottom (B = mounting lugs on the bottom of the screen only) although it may mean more than this!
1 = revision number of that display?
(aaaand that concurs with another source that I just found!)
So I searched for 'LP156WF4-SL??' and found a bunch of potential screens, which I cross-checked for interchangeability with my current display (using panelook.com), then searched Ebay/Amazon for each of them in turn.
I found one second-hand and thought 'why not?', despite the fact that my current screen has mounting tabs at bottom _and_ top! anyhow, we'll see soon enough if it will all work out