I just bought a 790 for parts for an 880 upgrade, when I powered it on it seems that the only issue is that there is no backlight on the LCD. Ive tried swapping in a known good panel and inverter board from a 900 but that will not light, but the panel and inverter from the 790 will light and display fine in my spare 900. I'm looking at the board and the resistors below the display connector appear to have a few missing compared to the photo of the 780 board I found on an archived copy of hpcnec. Here's a photo of my board:
Could these missing resistors be why the backlight isn't working or is it likely something else?
Thanks!