Macintosh Portable 5126 LCD Pinout

[Twconstantine]

I’m trying to troubleshoot my backlight portable 5126. I can see activity on the CPU, what seems to be the right voltages on the board. I’m getting no chime, but I’m also getting a black screen. The backlight is on, there is a clear border. It looks like maybe the DISP_BLANK is on, or the contrast is messed up. I verified the pinout on the 5120 schematics are not the same.
Anyone have the pinout for the LCD?

 

[Hugotronics]

If you don't get the chime, don't expect anything on the screen. The ROM is probably not being read, possibly due to a broken trace or a faulty IC.