Digital Research Monitor Dead?
 

I have a DRMON19 monitor that has no picture. One evening this 19"
computer monitor worked great, the next morning it didn't. Nothing was
changed overnite in its setup or location.

Upon turnon nothing comes on screen. The Power Indicator LED still
operates. This LED turns on with a green color and it stays on with no
orange
blinking color AND no on-screen error message box appears. Then, after
2-3 minutes, this LED turns off. So, something is 'alive' in the monitor

to sense there is a problem and to turn it off.

No noises, no smells, just nothing.

It is a shame that what is probably a very good monitor won't turn on
because
of something that might be awry in a turn-on sensing circuit.

Suggestions? Is this a candidate for checking solder joints?

Thanks

Digital Research Monitor Dead?
 

"DRT" wrote in message
...
I have a DRMON19 monitor that has no picture. One evening this 19"
computer monitor worked great, the next morning it didn't. Nothing was
changed overnite in its setup or location.

Upon turnon nothing comes on screen. The Power Indicator LED still
operates. This LED turns on with a green color and it stays on with no
orange
blinking color AND no on-screen error message box appears. Then, after
2-3 minutes, this LED turns off. So, something is 'alive' in the monitor

to sense there is a problem and to turn it off.

No noises, no smells, just nothing.

It is a shame that what is probably a very good monitor won't turn on
because
of something that might be awry in a turn-on sensing circuit.

Suggestions? Is this a candidate for checking solder joints?

Thanks


Without seeing it there's really not much anyone can tell you. Is there a
faint ticking noise? Any funny smells? If you're serious about fixing this
thing you'll have to pop the cover and do some investigating. Check voltages
out of the power supply, see if you have the 150-200v B+ at the HOT, and
check that as well as any large diodes and transistors to see if they're
shorted.

Digital Research Monitor Dead?
 

James Sweet wrote:

"DRT" wrote in message
...
I have a DRMON19 monitor that has no picture. One evening this 19"
computer monitor worked great, the next morning it didn't. Nothing was
changed overnite in its setup or location.

Upon turnon nothing comes on screen. The Power Indicator LED still
operates. This LED turns on with a green color and it stays on with no
orange
blinking color AND no on-screen error message box appears. Then, after
2-3 minutes, this LED turns off. So, something is 'alive' in the monitor

to sense there is a problem and to turn it off.

No noises, no smells, just nothing.

It is a shame that what is probably a very good monitor won't turn on
because
of something that might be awry in a turn-on sensing circuit.

Suggestions? Is this a candidate for checking solder joints?

Thanks


Without seeing it there's really not much anyone can tell you. Is there a
faint ticking noise? Any funny smells? If you're serious about fixing this
thing you'll have to pop the cover and do some investigating. Check voltages
out of the power supply, see if you have the 150-200v B+ at the HOT, and
check that as well as any large diodes and transistors to see if they're
shorted.

Thanks for the response. As I said before no noises, no smells, just blank
screen and the little LED blinking. It worked great in the evening and the next
morning it would not start. No warning, no symptoms, nothing.

Digital Research Monitor Dead?
 

Without seeing it there's really not much anyone can tell you. Is there
a
faint ticking noise? Any funny smells? If you're serious about fixing
this
thing you'll have to pop the cover and do some investigating. Check
voltages
out of the power supply, see if you have the 150-200v B+ at the HOT, and
check that as well as any large diodes and transistors to see if they're
shorted.

Thanks for the response. As I said before no noises, no smells, just blank
screen and the little LED blinking. It worked great in the evening and the
next
morning it would not start. No warning, no symptoms, nothing.


That's pretty typical, it could be a bad solder joint, but often a
transistor or diode shorts the moment the unit is turned on, resulting in a
similar symptom.

Digital Research Monitor Dead?
 

James Sweet wrote:



Without seeing it there's really not much anyone can tell you. Is there
a
faint ticking noise? Any funny smells? If you're serious about fixing
this
thing you'll have to pop the cover and do some investigating. Check
voltages
out of the power supply, see if you have the 150-200v B+ at the HOT, and
check that as well as any large diodes and transistors to see if they're
shorted.

Thanks for the response. As I said before no noises, no smells, just blank
screen and the little LED blinking. It worked great in the evening and the
next
morning it would not start. No warning, no symptoms, nothing.


That's pretty typical, it could be a bad solder joint, but often a
transistor or diode shorts the moment the unit is turned on, resulting in a
similar symptom.

I'm pretty good at reading schematics and understanding circuits. Is there any
chance this monitor's schematic is available. The company, or at least the
division that made monitors, went belly up 4 years ago. Any idea of which other
monitor might have the same circuits and, hopefully, have its schematic
available?