15 Oct
2013
15 Oct
'13
1:50 p.m.
On Wed, 16 Oct 2013, Tony Duell wrote:
The monitor circuit is pretty conventional, fromwhat I
remember, but I
suspect that's not a lot of ohelp to you. I cna tell you how I'd
troubleshoot it :
0.5) Turn up the brightness.
In this, and many other cases, that is ALL that is needed.
But, in many cases people will be horribly offended by that suggestion.
But, in the case of an actual fault, being able to see whether the screen
lights up and/or shows a raster and/or retrace is a significant diagnostic
step.
1) Take off the case. Power up
Although not relevant here, check the other controls.
When I was in college, there was a little Sony monitor (AC/DC, with tuner
AND video inputs) from a Sony AV series video recorder that was discarded.
I found that there was a double throw switch that was in between its two
positions.
30 years ago, at a computer swap, I paid pennies for a full size Sony TV
set that had been converted into a monitor, with both composite and RGB
inputs! Its problem was also a double throw switch between positions.
In the priciple of "superstitious learning", therefore, the first step to
try with any product (particularly Sony TV/monitor) is a control switch
out of position.