Do a manual override and see if that allows you to communicate with the display.

Nope, didn´t help. Can´t communicate with the unit.

Is it possible to remove the back pcb and replace that
some universal serial backpack unit. ?

- like how many 44780 parallel lcd controllers are builded.
(eg ...

Hi,

I have an old lk204-25 rev 2.0 witch seems to be dead i think.
It is serial model.

Display is full of weird characters when powering it up and it dosen't show any kind of boot logo. Witch it use the do when it was new.

Is this totally dead, or are there any possibility to fix it somehow. ?
I ...