Replacing Kronos screen

[yeskeys]

I fixed 4 different Korg M3s where the screens died. I recall getting and replacing a new ribbon cable to fix a couple screens, and sometimes just buying a replacement screen and swapping the whole thing out.

I have a Kronos, 1st gen, where there was not backlighting or lighting. You could press different areas of the screen where you knew where the touchbuttons were (from memory), and that worked, but no lighting so basically flying blind. In trying to repair, I've had a few different screens where I've sometimes successfully
1. laid the new screen in place and attached the KLM-3007 board connections, but again dark/"invisible" buttons work, but you just can't see anything on the screen. Sometimes invisible buttons work, but no lighting. Sometimes I get just contiguous backlight a solid light gray. One replacement screen I ended up disassembling and there were layers of sheeting you could not easily see through, and these layers when stacked formed the outline for where the top or bottom buttons that form a left to right menu were cut out. Now I'm going to swap out the KLM3007 board.
Any ideas that could fix this? I noticed some screens have a 2 prong connector for what I think is lighting, like 3-5v, that plugs into the 3007.
I had one screen where it looked like it was supposed to look when I finally got light projected, but then a very light transparent sheet, like saran wrap, got pinched and no more sensing the buttons (they emit a beep) Or projecting the menus, and interface.

Thanks!

PS - I tried to buy a second hand Kronos off of Reverb, but was obviously being scammed and finally got my money back. DO NOT USE REVERB, they have gone WAY DOWNHILL and you'll NEVER get a person on the phone.

[gurn]

No idea but I'm following the thread. I just bought a used Kronos off Facebook for a good price. It has 3 vertical lines on the screen. So that's why I got a discount. I hope I'm not looking at a replacement.