Power LED

Will a bad power led keep the power supply from coming on? Thanks.
William

No, it shouldn't be a factor at all.


--
Jan Alter

or

"Bill" wrote in message
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Will a bad power led keep the power supply from coming on? Thanks.
William

Bill wrote:

Will a bad power led keep the power supply from coming on? Thanks.

Unless it is wired weird (in series with an output or PS_ON circuit), no.

"Bill" wrote in message
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Will a bad power led keep the power supply from coming on? Thanks.

If you put it in the wrong place you can short something out.

"Bill" wrote in message
news
Will a bad power led keep the power supply from coming on? Thanks.
William

No, but a bad power supply will keep a led from coming on....

Ralph Mowery wrote:

"Bill" wrote in message
news
Will a bad power led keep the power supply from coming on? Thanks.
William



As always it depends. If it is bad because it is shorted then it will keep
the suppply from comming on. If it is open then no it will not , if it is
plugged in backwards it will not , if it is plugged in where it shouldn't
then maybe yes or no. Just unplug it if it is plugged into anything and see
what hapends.
The computer does not need it to run.


The LED has a current limiting resistor otherwise the LED would be
destroyed once power were applied. LEDs operate with about 8 ma. It is
very unlikely that even if an LED were shorted that it would prevent the
power supply from starting up due to this limiting of the current for
the LED. I don't like people who feel they must correct posters when
they make an error, but I thought you might want to know about this fact.

"Bill" wrote in message
news
Will a bad power led keep the power supply from coming on? Thanks.
William


As always it depends. If it is bad because it is shorted then it will keep
the suppply from comming on. If it is open then no it will not , if it is
plugged in backwards it will not , if it is plugged in where it shouldn't
then maybe yes or no. Just unplug it if it is plugged into anything and see
what hapends.
The computer does not need it to run.

On Sat, 03 Apr 2004 23:28:12 GMT, lid wrote:


The LED has a current limiting resistor otherwise the LED would be
destroyed once power were applied. LEDs operate with about 8 ma. It is
very unlikely that even if an LED were shorted that it would prevent the
power supply from starting up due to this limiting of the current for
the LED.

What if the shorted LED prevents the motherboard from initializing,
keeping the PS PS_On signal pulled low, would that not have same end
result of the power supply not turning "on".

I don't like people who feel they must correct posters when
they make an error, but I thought you might want to know about this fact.

What would keep urban legends, bad advice or other misc falsehoods and
technical errors from having a negative impact if the errors aren't
corrected or at least discussed? Everyone's wrong every now and then, but
to learn from that, the error must be pointed out... fact over ego, so
long as it's _useful_ in some way.

The LED has a current limiting resistor otherwise the LED would be
destroyed once power were applied. LEDs operate with about 8 ma. It is
very unlikely that even if an LED were shorted that it would prevent the
power supply from starting up due to this limiting of the current for
the LED. I don't like people who feel they must correct posters when
they make an error, but I thought you might want to know about this fact.

I am well aware of the way a LED operates. I work as an instrument mechanic
in a very large factory. I deal with most aspects of electricity and
electronics from computers to 480 3 phase circuits at 600 amps.

I was thinking of the whole LED system from the plug out. I did see one
computer where some wires going to the led was shorted and there was enough
current to heat up and burn the insulaton off the wires.

Ralph Mowery wrote:

"Bill" wrote in message
news
Will a bad power led keep the power supply from coming on? Thanks.
William


As always it depends. If it is bad because it is shorted then it will keep
the suppply from comming on.

No. This is quite incorrect.