First let me thank all of you for such a terrific forum.
In my recent Craigslist score, this was the smallest of the three for $20 deal. I'm awaiting caps for the other 2, but this one acted differently.
Out of the box, when booting the monitor, the green status light would flash more quickly than normal, then one couldn't turn the unit off reliably. The "check cable" box moved about on the screen as I didn't have the VGA attached. I noted on opening the bezel that the ribbon cable to the front buttons seemed to fall away too easily. Re-attached the button board, still same problem. Opened it up and inspection shows nothing obvious o/t the ribbon to the buttons seems to have one more right angle fold than needed to reach the button board and still lay flat.
Reflowed all (ugh) joints on the back of the logic board and the PS/inverter board. Reflowed the transistors on the front of the logic board, but other connections looked okay and those are really small even for my Hakko. Still no joy.
Connected to a computer, I see a fabulous image with a random dance of the monitor's menu all the time.
Tugging on the button board does nothing, reflowing the board, nothing, de-soldering the menu button and reboot, nothing; all resistors on the button board are okay; reseated all cables, nothing. Once the monitor is up, if I disconnect the button board, the menu disappears and all appears normal (I may not have supposed to do that, but so far so good). Haven't traced the continuity of the button cable while flexing it, but am wondering what I'm missing?
In my recent Craigslist score, this was the smallest of the three for $20 deal. I'm awaiting caps for the other 2, but this one acted differently.
Out of the box, when booting the monitor, the green status light would flash more quickly than normal, then one couldn't turn the unit off reliably. The "check cable" box moved about on the screen as I didn't have the VGA attached. I noted on opening the bezel that the ribbon cable to the front buttons seemed to fall away too easily. Re-attached the button board, still same problem. Opened it up and inspection shows nothing obvious o/t the ribbon to the buttons seems to have one more right angle fold than needed to reach the button board and still lay flat.
Reflowed all (ugh) joints on the back of the logic board and the PS/inverter board. Reflowed the transistors on the front of the logic board, but other connections looked okay and those are really small even for my Hakko. Still no joy.
Connected to a computer, I see a fabulous image with a random dance of the monitor's menu all the time.
Tugging on the button board does nothing, reflowing the board, nothing, de-soldering the menu button and reboot, nothing; all resistors on the button board are okay; reseated all cables, nothing. Once the monitor is up, if I disconnect the button board, the menu disappears and all appears normal (I may not have supposed to do that, but so far so good). Haven't traced the continuity of the button cable while flexing it, but am wondering what I'm missing?
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