they called to report a unresponsive machine, I checked and found that the display indicated "turn off duplex" (this model doesn't have duplex option installed), after turning it off/on the display came to "ready" but copy button didn't respond. So I opened the keyboard to check microswitches and I found dark sticky spots around duplex button, customer accepted then that they had a little "accident" with the remnants of a cup of coffee.
I used the multimeter to check conductivity of all buttons and all seemed OK. I proceded to change "duplex" microswith with a new micro anyway.
But machine remains the same. I tried to access service mode to activate "reset all" function but keyboard is not accepting ANY key at this point (no numbers change, no up and down arrows etc. not a single button working, liquid didn't reach ALL keys, only duplex function key).
I am wondering which board should I order next, the keyboard itself or the Image processor board? (the keboard is connected to it), since it's a matter of $$ I'd like to hear previous experiences from you guys.
I used the multimeter to check conductivity of all buttons and all seemed OK. I proceded to change "duplex" microswith with a new micro anyway.
But machine remains the same. I tried to access service mode to activate "reset all" function but keyboard is not accepting ANY key at this point (no numbers change, no up and down arrows etc. not a single button working, liquid didn't reach ALL keys, only duplex function key).
I am wondering which board should I order next, the keyboard itself or the Image processor board? (the keboard is connected to it), since it's a matter of $$ I'd like to hear previous experiences from you guys.
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