hi TelNetSystems,
A couple of years ago, I was having a lot of trouble with MLX-20L's and MLX-10D's. What I found to be the trouble was defective LED's. After the phone locks-up, shut off any surrounding lights. You should be able to see a faint glow from the bad LED. I think the (sneak) current through the LED, acts as if that particular key is being pressed.(that is why no other keys will function) You can duplicate the trouble by holding down any key and try pressing another key. Nothing!
Quick Fix - If it's a key that you are not utilizing (or you don't need the LED,) just pluck it off. However, I can tell you from experience, it's just a matter of time before another one goes bad. For the time and energy, your better off replacing the flex board. Hope this helps
A couple of years ago, I was having a lot of trouble with MLX-20L's and MLX-10D's. What I found to be the trouble was defective LED's. After the phone locks-up, shut off any surrounding lights. You should be able to see a faint glow from the bad LED. I think the (sneak) current through the LED, acts as if that particular key is being pressed.(that is why no other keys will function) You can duplicate the trouble by holding down any key and try pressing another key. Nothing!
Quick Fix - If it's a key that you are not utilizing (or you don't need the LED,) just pluck it off. However, I can tell you from experience, it's just a matter of time before another one goes bad. For the time and energy, your better off replacing the flex board. Hope this helps
