Sorry to resurrect an old thread, but just obtained a non-working CMU200, and all my searching revealed this thread as really the only resource for a resolution. So, here goes:
Pulled off the cover, and noticed that the standby led was lit constantly, which I guess is good. However, the power button on the front of the unit doesn't light up at all. I removed the PSU, but can't seem to get any voltage out of the PSU on the bench...not even the standby voltage, which surprises me.
Put the PSU back in the unit, LED shows standby voltage, and grounded pin B1 through 200K resistor, but nothing happened. None of the LEDs lit, and the unit is just dead. Monitored B1 with a scope, and there is no voltage present with the PSU installed and powered on, and of course, no ground/low signal when the front panel button is pressed.
I tried to initiate turn on by grounding B1 through the 200K resistor with the PSU removed, and no go.
Really confused by all this, and my electronics knowledge just isn't great enough to figure this out alone.
Any direction or help would be greatly appreciated.
UPDATE: So, with the PSU installed and connected, I grounded, without a resister, B1, and lo and behold, the PSU started, all the LEDs went green, and got some beeps, and the HD was definitely spinning and doing its thing, but no lights came up on the front panel, and the LCD stayed dark. Gonna pull all the option slices out, and see if I can get it to boot, but at this point, I am leaning towards something wrong on the front panel or motherboard. "Hopefully" I'll find something that burnt, or a misaligned or damaged cable, or something.
UPDATE 2: Got some beeps out of the unit, and with a flashlight, I am able to see something on the screen. So, perhaps the invertor is not operating. But still, no lights on the front panel, so still hoping/thinking there might be an easy solution once I get the front assembly off.
Kindly,
Michael