So I've got an MX-5500 that powers up, but that's it. The green LED above the power button lights up, but everything else is unresponsive. The display doesn't show any signs of life. No response from any of the buttons. I've taken a multi-meter to the the display pwb and everything seems to be getting power.
It seems as though it's not getting past the boot process maybe? On the control PWB there are three green blinking LEDs (LED1, LED2, LED3). I know on other machines I've worked on these have indicated something though I cannot for the life of me remember what it is, and I cannot find anything in any of the service manuals describing what they might mean.
Aside from just ordering parts to try out different things I'm at a loss.
Would bad boot ROM cause the machine to act this way?
It should be noted also that when I took the display apart there were quite a few signs of damage. Several broken pieces of plastic and screws holes stripped and broken off. I asked as subtly as I could if anything might have happened, but we all know the answer to that question.
*edit* The machine will turn on, and warm up. The fans will go, just the buttons and display are dead... leading me to think it was a display issue.
Any thoughts on where to go with this?
Thanks in advance!
It seems as though it's not getting past the boot process maybe? On the control PWB there are three green blinking LEDs (LED1, LED2, LED3). I know on other machines I've worked on these have indicated something though I cannot for the life of me remember what it is, and I cannot find anything in any of the service manuals describing what they might mean.
Aside from just ordering parts to try out different things I'm at a loss.
Would bad boot ROM cause the machine to act this way?
It should be noted also that when I took the display apart there were quite a few signs of damage. Several broken pieces of plastic and screws holes stripped and broken off. I asked as subtly as I could if anything might have happened, but we all know the answer to that question.
*edit* The machine will turn on, and warm up. The fans will go, just the buttons and display are dead... leading me to think it was a display issue.
Any thoughts on where to go with this?
Thanks in advance!
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