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The board is a 820-2915B.... the working file seems to be the issue with the video at boot...
I found a generic 820-2915/2914 jed file (https://github.com/ayilm1/gMUXBypass).....and tried it....had only success in stopping the flickering......on the boot....after the apple logo the screen goes...
Board back to original state.
Reprogrammed again the 'come_back' jed file then the 'working' file.
Put back the R2415 after programming.
Still have the same weird behaviour......flashing portion of screen during apple logo then goes dark.
Was able to flash with the original JED file.....screen went black on boot.
Flashed the working JED file....now the screen flashes the top of the screen on Apple logo bootup and then goes dark at the end (No image, looks like backlight is lite up....but no login screen is shown.
Removed R9704 and tied together BKL_EN & BKL_PWM
Also Removed R8904 and R8911as well..
Apple Logo shows up full brightness on boot but display seem to turns off on Login screen.
Not sure if GMUX flashed properly but demux utility won't allow me to use the license that it showed consumed initially
No not solved, I only indicated that the LCD was connected and it works....initial issue has not been resolved.
I'm going to have to go back to the start on this and check the path, not sure what is happening with BKL_EN and BKL_PWM.
Put back the board after doing some minor cleaning....and MLB is working at normal speed now.
I downloaded HWMonitor and have a 60W charger to use, currently running Unigine test.....going to do an ultrasonic clean afterwards and re-test