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Is it the PSU or the UPS???

Last response: in Components
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June 6, 2011 8:29:02 AM

Hi Guys! :hello: 

I have a weird problem.

As of 2 weeks now, when the system is powered down(UPS is also off) and inactive for a few hours, My PC doesn't startup when the start button is pressed again.

Instead, the power L.E.D lights up together with the DVD-ROM L.E.D and then goes off again.

All the Fans in the casing also start up together with the L.E.Ds, but shut down when the LEDs go out.

This keeps repeating over and over again.

It stops when I turn off the UPS

The HDD L.E.D doesn't light up in this process.

Afterwards I turn off the UPS, Turn it back on, Unplug the Ethernet cable(From my router) from the mobo, :heink:  and Press the Start Button, and The System starts up normally, like nothing Happened. There are no error messages or anything of the sort.

This is very confusing for me, please advise. :cry: 

I tried the following:
Startup without the UPS - Delivers same result. So the UPS can be left out of the loop I guess (But I can be wrong).

PSU - InWin Commander 750W
UPS - ProLink 650VA


More about : psu ups

a b ) Power supply
June 6, 2011 9:40:01 AM

First problem indicates that its the PSU. But later it gets confusing. But i would suggest that try with a different PSU first. If it gets solved then you know which one went bad.
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June 6, 2011 5:45:01 PM

So, are you saying you can't turn on your computer while the ethernet cable is plugged into your motherboard?
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a c 1200 ) Power supply
June 6, 2011 10:25:07 PM

That ethernet cable statement is weird.

Have you tried a different ethernet patch cable?
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June 7, 2011 12:16:42 AM

Make sure your Ethernet adapter doesn't have POE enabled.
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June 7, 2011 5:19:47 AM

arson94 said:
So, are you saying you can't turn on your computer while the ethernet cable is plugged into your motherboard?


Yes, thats what I have seen so far. Very Weird Isn't it??? It totally freaks me out. But the thing is, If I shut down the PC and Leave the UPS on, there seems to be no issue in re-starting the system. No need to remove any cables or anything of the sort.

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June 7, 2011 5:22:59 AM

Jim_L9 said:
Make sure your Ethernet adapter doesn't have POE enabled.


What does POE have to do with it??
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June 7, 2011 5:25:51 AM

ko888 said:
That ethernet cable statement is weird.

Have you tried a different ethernet patch cable?


Not yet. I will ASAP.
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June 7, 2011 6:30:45 AM

just try this once whenever u have the same prob just open ur cabinet...unplug each and every socket,,,mobo connection,,,, switch open ram sticks and last but not the least unplug bios battery(white silvery shinny object)
wait for 10 mins then plug in each and every socket carefully
then turn on ( with ur UPS :)  )
let me know if that works :) 
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a b ) Power supply
June 7, 2011 8:52:36 AM

rko_gmr said:
just try this once whenever u have the same prob just open ur cabinet...unplug ecah and every socket,,,mobo connection,,,, switch open ram sticks and last but not the least unplug bios battery(white silvery shinny object)
wait for 10 mins then plug in each and every socket carefully
then turn on ( with ur UPS :)  )
let me know if that works :) 

If you just want to reset BIOS. Unplugging everything is not necessary. Just taking out the power cord and the battery does the job fine. Also there is a jumper to do that as well.
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