I have a workstation HP Z1 all-in-one with the backlight working partially, in the overall is good but on the left is dimmer. I found online the option to replace the screen but the exact model is impossible to find without moving with hp spare part which is extremely expensive, considering I have taken a refurnished model. The screen is LG lm270wq1 (SD) (BD) and I found a lot of different end code (A1) (B1) (E3), so I want be sure to find the best and cheap way to restore the backlight, are those model compatible? Is there a website where I can buy just the backlight?

Attached 2 pics with the faulty and the serial

Thank you all in advance for the support