Question

Desktop does not boot

Used it just this morning and now some hours later, it doesn't boot anymore, i see that one light is still on(usb 3.0) port but yeah, when i try to boot it, nothing happens. Is my PSU dead? I removed ram and gpu but nothing still. No beeps or anything.
Or is it cpu or motherboard?

Post was last edited on July 19, 2018 10:26 AM PDT

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Answer
You can't know without testing.

But in my experience it's rarely the CPU today. It can be simple things like a CMOS battery but I find many owners today don't want to try such even if it's a dollar part.

So what to do? Let's hear more about this PC. It may be so old that you can find working replacements for 99 bucks.

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Specs

Not that old, 6 years i think, used mostly for gaming.

CPU. I3 3220
GPU: GTX 950, bought it 2 years ago, before it had 650
HDD, 1TB HDD, about a year old now
PSU 500W 230V Coolermaster
MB: MSI B75A

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So would you consider popping in a new CMOS battery?

I'm running into so many that push back on cheap possible fixes. I can't guess why.

If you need an absolutely will fix it answer, you replace the PC or take it to the shop where they will do this small thing and more.

This is not to upset you but all sorts arrive here. I like to avoid the repair counter or replacement parts so I go with cheap or most likely with cheap being first.

The i3 is protected against overheating so it's something else. The machine make is not shared so if "built" you tear it down and place the bare min parts on cardboard and try again. WHY? Because I find so many boards shorted out in the case from loose parts floating around to extra motherboard mounting posts shorting out the motherboard back side. Why gets those owners is "it worked for years. How could it be that?"

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If it really is the battery

I can change it myself, if it really is that. Only need to find one.

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It's a possible cause.

At the bench I either just pop in a new one as most are the very common CR2032 which we get in bulk for close to 25 cents. If I don't have the battery handy I get out the Volt meter.

I guess folk want assurance it's this part. It may or may not be. I wonder why this is why folk want assurance this is it? You can't tell with the story so far but it can cause the problem noted.

It's certainly cheap. But for some, this isn't good enough a reason to try.

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So

Gonna buy one tomorrow and test out, if still nothing, then it's time for new pc or send it to repairs`?

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Or strip it down to min parts on cardboard.

If the battery doesn't help, you need a Volt meter to check basics as well as spares (motherboard, PSU, etc.) to figure it out.

Shop counter fees here start at 150USD so few repair such today.

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Oh well

Well, i changed it and still nothing, just great.
Update: i tested out PSU, it works
So it's cpu or motherboard. And nobody sells them here anymore.
I guess it's time for new pc

Post was last edited on July 20, 2018 2:09 AM PDT

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After these get too old.

You won't find the spares in the shops but on Ebay, Newegg, Amazon and where ever you find old desktops.

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