[sdiy] Boss DR110 weak display

[Gil W.]

Hi all.

I've been fixing a DR110 which had battery leakage. Some acid drops here and there, basically I think it is fixed now as it powers up and all buttons responds and it sounds and functions as it should with no seen issues.

The only problem is that I can barely see anything on the display. I first thought that there was nothing displayed at all, but then I noticed that it does show faint marks, which are seen better as I enlarge the viewing angle... it looks like it does show the correct data, once viewable. 

The power adapter I'm using is 9v/880ma so I see no problem with that... I also tried batteries - 4 x 1.5v and a 9v. With the 9v battery the display marks are better seen, but still not fully, and the strength of display changes with the preset... Inside, the operating voltage as it should - 5.4v

Are the LCD displays (such as in the DR220/TR707 etc) known as tending to get weak over the years and need replacement ? any idea what could cause that and what should else be checked ?

Thank you very much for your help!