I connected an 9.4Vdc 400mA power supply for external pc speakers to a
12V power supply line from the back of my Dell 20" FP LCD monitor
intended for an optional "speaker bar" that Dell sells. Suffice to
say, neither the monitor nor the dc power supply are working. Anyone
know what to look for to repair the monitor? Is it salvageable?
Possible just some components near the power supply outputs needing
replacing?

I can only assume that the Dell people were smart enough to assume someone
would short out the power output line as you just did. And I can assume that
they probably put a fuse in their internal Power supply that would protect
that Power line. Open her up and check for a fuse.
If your lucky, you blew it out. If your not lucky, you took out the Monitor
PS.

Larry


"Salman" wrote in message
oups.com...
I connected an 9.4Vdc 400mA power supply for external pc speakers to a
12V power supply line from the back of my Dell 20" FP LCD monitor
intended for an optional "speaker bar" that Dell sells. Suffice to
say, neither the monitor nor the dc power supply are working. Anyone
know what to look for to repair the monitor? Is it salvageable?
Possible just some components near the power supply outputs needing
replacing?

"Salman" wrote in message
oups.com...
I connected an 9.4Vdc 400mA power supply for external pc speakers to a
12V power supply line from the back of my Dell 20" FP LCD monitor
intended for an optional "speaker bar" that Dell sells. Suffice to
say, neither the monitor nor the dc power supply are working. Anyone
know what to look for to repair the monitor? Is it salvageable?
Possible just some components near the power supply outputs needing
replacing?


I would start by looking for fuses / circuit protectors / safety resistors.
These may not be too obvious, as they likely will not look like something
that you would traditionally identify as a fuse - ie a glass or ceramic tube
with end caps. Many fuses in this type of equipment, are about the size of a
1/4 watt resistor, and are wire ended. Circuit board silk screening may call
them "F", "CP" or "ICP" and there might be a rating also silk screened on.
Other types look like a little cylinder, and have a rating written on their
flat top. Still others, are surface mount, and are usually about the size of
the surface mount decoupling caps that you see scattered all over boards
these days. Finally, if a safety resistor type, then it will actually look
like a resistor.

Arfa