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PC won't turn on ...

by NozzaC / March 12, 2008 10:23 PM PDT


My turned itself off and now won't turn back on again. If I press the case on-switch I do hear a slight click sound (I THINK it's from the PSU but can't be sure) and the ethernet card LED lights up at the back. Other than that, no life at all.

I'm guessing it needs a new power supply but could it be something else? I don't want to burn

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PSU - power issues
by Willy / March 12, 2008 11:21 PM PDT
In reply to: PC won't turn on ...

The topic of your post has been covered numerous times. The solution can be found by using the "forum search" to get what needs to be done. Review and try various fixes and/or attempts at one.

However, it usually always boils down to replacing the psu. Get a compatible one and basically get a bigger wattage unit. A brandname does better and spending money now will pay for itself.

FYI - provide system details to better help you.

tada -----Willy Happy

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by NozzaC / March 12, 2008 11:45 PM PDT
In reply to: PSU - power issues

I did indeed search first but my next question is the point of contention which made me post: If it were the PSU then why would the ethernet card light up?

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by Willy / March 12, 2008 11:57 PM PDT
In reply to: Q

Don't be mislead, the power is only(a surge) momentary there, either not all or low voltage is present and the system thus won't allow a boot or a continuance. Understand, this is not just a simple flip the power-ON, but rather a logical sequence that the system follows. Multiple voltages are present and for whatever reason, the system isn't capable to power-ON. The flip side is the mtrbd. which provides the logic(build-in) to maintain this and if it gets hosed, similar results. But, either way, replacing the psu with a better one is just good insurance. Further, other posts provide a lengthy resolution but is always gets back to the psu replacement. Spending money for psu tester is better spend on a new psu should you figure that as way to fix this.

tada -----Willy Happy

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Re spending $$ on a PSU tester....I think that depends.
by VAPCMD / March 14, 2008 5:57 AM PDT
In reply to: Alas...

If a quality replacement PSU costs $50 and the PSU Tester is $15...you might be right. On the other hand .. if the replacement PSU costs $150 and the PSU tester is $15 ... think I'd rather spend $15 to ensure it is the PSU and than spend $150 only to find that doesn't fix the problem.

Fortunately I have PSU testers and spare PSUs so I'm covered. Practically speaking I can see where most folks wouldn't want to do that.


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by NozzaC / March 14, 2008 6:59 AM PDT

I replaced the PSU and.......it wasn't the PSU. The new one doesn't work either. In fact now even the ethernet card doesn't like up.

I can get both the old and the new PSU to power up by connecting the black and green wires but once plugged into the mobo all is dead.

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Step 1
by Willy / March 14, 2008 8:21 AM PDT
In reply to: oh...

In my 2nd post, I offered that the flip side the mtrbd. can have its start ckt. be bad. One reason to replace the psu rather than a mtrbd. The trick to jumper the psu isn't always valid as "no load" is present. Further, that trick only proves that the psu is truly fried, under a "go or no go" situation. On my 1st post I mentioned to review previous posts of the forum as they cover various attempts at "system of no power" which in turn refers to reduce devices/componets, etc. to reduce the load. You may find the offending device. In fact you can remove all devices/componets and if the system posts a bios display and even an error or beeps, that suggests the mtrbd. maybe good or the psu just wasn't capable, similar outcomes. With a known good psu you now pin-point the real problem if you hadn't reduced the system beforehand. On top of all this a truly bad component/device can take out a new psu on 1st try or later after several attempts. This is why, I post many times not to take anything for granted. I realize this may seem so-so info now but the topic is well covered which is why I deferred to past posts.

tada -----Willy Happy

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