DIYbanter - View Single Post - 22" monitor GNR TS2200WA

Ralph Mowery

In article ,
says...

I've prized the case off and got sight of the two boards; one power and
one logic. Both well provided with component annotations, even for the
jumpers, but of course I don't have a schematic. Boards are connected by
a cable that, it says, supplies +5V and has one sense "ADJ" line and one
"On/Off" line. Quite like a PC or no doubt lots of other appliances
which have a low-power standby state. The power supply is marked that it
supplies +5V, and "optionally" +24V, +12V and -8V.
Measuring, the +5V started at ~3V and worked up to a rather wobbly 5V.
Must stick a 'scope on the wobbles to see if I can spot a pattern. The
"ADJ" line also varied ~2V / ~3V. But clicking the power switch made no
difference to the +0.1V on the "On/Off" line.

Did you see this youtube about the monitor ?

I think I would start out just replacing the electrolytic capacitors on
the power board.

Many switching supplies seem to have blown capacitors. I have repaired
several items around my house by replacing capacitors.

One give away for me is to take the heat gun of my hot air rework
station and playing it around one or two capacitors at a time. If the
set starts working or manking a big change I replace them.