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How can a common home user find out whether the PSU is good or bad ?

By dianoban99 ·
Tags: Hardware
My PC is stuck at acer logo 3 seconds after power on. USB ports and DVD drive are dead.

Have tested the RAM, GPU & SSD and it seems that the issue is not caused or directly caused by anyone of these units.

How to find out whether the PSU on this PC is good or bad, please?

Thanks.

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Re: PSU

by Kees_B Moderator In reply to How can a common home use ...

The common home user needs a common Volt meter and the manual that says which output should have which voltage.
Same, by the way, as a professional tech.

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Kees_B Moderator

by dianoban99 In reply to Re: PSU

Thank you.

I'll try to get volt meter and manual. Afraid that getting a manual might be difficult. I remember years ago, in 2013, I tried download a manual from Acer but failed. Will try again. The problem is too serious to give this time.

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I guess....

by birdmantd Moderator In reply to How can a common home use ...

I must be an uncommon home user since I never had to test it. I always thought it was the common user who didn't need to test.

Kees_B is right on track with his post.

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To birdmantd Moderator

by dianoban99 In reply to I guess....

Thank you.

There a serious issue happened to my PC. Have to find the cause of the issue for making a choice, repair or buy a new one.

I am really a common user. There are no peripherals on this PC except for the keyboard & mouse. No other sophisticated software installed on this machine except the system & Photoshop. I am an amateur photographer. About 95% of what I do on this machine is photographic processing, both digital & film images.

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Kees is spot on.

by rproffitt Moderator In reply to How can a common home use ...

But as Tom points out the everyday PC user does not do this. Moving on or up?

1. Do the test as Kees noted. Volt meters are cheap, plenty of YouTubes how to measure the common PC PSU voltages. Fairly safe tech work but always use caution.
2. Frankly if the logo shows, the PSU did come up to voltage.

You left out full PC details so we can't go much further. Let's get the Age, make, model and any other clues in this discussion.

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To rproffitt Moderator

by dianoban99 In reply to Kees is spot on.

Thank you.

"Moving on or up?"
Moving on.

This PC.
Acer Aspire T3-715 desktop
Manufactured in 2015 & bought in June 2016 & used since then
Windows 10 Home 64-bit, updated to 21H1
Intel Core i5 Processor 6400
NVidia GeForce GTX745 4GB
Hard Drive : SATA3 1TB & SSD 128GB
Memory : DDR4 8GB
DVD-Super Multi drive
Card Reader
Integrated LAN 10/100/1000

Other clue.
The PC had one & only issue in give years. 2020, windows updated to 20H1, I could not login the system. I did a clean install. Nothing, absolutely nothing else.

Three months ago, Windows updated to 21H1. Shortly after this update, crashes & BSODs one after another for about 2 weeks. I made preparations for another clean installation. The PC got stuck at acer logo, three seconds after power on. USB ports & DVD drive were dead.

Currently, these are the things still functioning on this dead PC:
1. Power on button, can switch power on.
2.Light in front panel is lit.
3.A short "POO" sound from the speakers at power on.
4.CPU fan & GPU fan & PSU fan spin.
5.Monitor is on & acer logo is on & booting stuck here.
6.Power off when start button is pressed.
I do not see or hear anything else other than these.

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To be honest....

by birdmantd Moderator In reply to To rproffitt Moderator

I seriously doubt that the Windows updates caused the issue, I think it is a hardware issue. I would take it to a computer repair facility for an evaluation.

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By moving up.

by rproffitt Moderator In reply to To rproffitt Moderator

I meant that the common home user is advancing their skills and research.

Here's more ideas given we know what this PC is from above.
1. This PC with the i5-6400 has onboard graphics ( https://ark.intel.com/content/www/us/en/ark/products/88185/intel-core-i56400-processor-6m-cache-up-to-3-30-ghz.html )
There are priors where this card (and a lot of other GPUs fail and stop the boot process https://forums.tomshardware.com/threads/nvidia-geforce-745-gtx-4gb-info.1833256/page-2#post-15708018 )
- Remove power then the GTX 745, connect up to the monitor and re-test.
2. https://community.acer.com/en/discussion/649780/how-to-make-acer-aspire-t3-715-boot finds another eerily similar failure.
3. Remember that advice "Replace the cheapest part first"? I'd slip in a new CMOS battery.
4. https://forums.tomshardware.com/threads/boot-dies-at-oems-logo.3727659/ finds another failure discussion.
- They are also getting into swapping parts but after decades of PC repair (since about 1984) I've yet to find a BIOS that failed. Yes, had to reflash a few but not something I suspect when dealing with a dead PC.

As to RAM and drives we don't need drives yet. As to RAM I might unplug and plug them back in just because we see owners get inside and often have it half plugged in. Once the voltage checks are done, the CMOS batter replaced, the drives unplugged and the video card switched to onboard then we try a single stick of RAM.

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To proffitt Moderator

by dianoban99 In reply to By moving up.

Current status of the PC:
1.Start button can switch power on.
2.Light in front panel is lit.
3.A short "POO" sound from the speakers at power on.
4.CPU fan & GPU fan & PSU fan spin.
5.Monitor is on & acer logo shows up & booting stuck here.
6.Start button can switch power off.

Tests tried:
1. Cleaned RAM, GPU, SSD & CPU.
2. Tried other keyboard & mouse.
3. Tried a different monitor.
4. Disconnect SSD & SATA drives, then switch power on.
5. Devices & cables & wires disconneted, AC power connected, power on.
6. CR2032 removed & for 3,10minutes even 13 hours, tehn put back in.
7. Remove RAM, then power on.
8. Revove RAM & GPU, then power on.
9. Borrowed RAM, GPU & SSD from normal PC, tried on mine.
No difference. None of these tests made any change to the stuck status.

Help, please?
What else must I try?

Thank you.

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Since you didn't try the test I noted.

by rproffitt Moderator In reply to To proffitt Moderator

"Here's more ideas given we know what this PC is from above.
1. This PC with the i5-6400 has onboard graphics ( https://ark.intel.com/content/www/us/en/ark/products/88185/intel-core-i56400-processor-6m-cache-up-to-3-30-ghz.html )
There are priors where this card (and a lot of other GPUs fail and stop the boot process https://forums.tomshardware.com/threads/nvidia-geforce-745-gtx-4gb-info.1833256/page-2#post-15708018 )
- Remove power then the GTX 745, connect up to the monitor and re-test."
And a new CMOS battery.

It appears you did neither, I suggest you do this. We are talking 10 to 15 minutes of work and for the battery, a dollar (here it's less than that.)

-> We don't need any DRIVES at this point. We only need one stick of RAM. We don't need the GPU as it has onboard graphics. The battery? It's too cheap to not replace and testing said battery is more time consuming than it is worth. Watch https://www.youtube.com/watch?v=RMQI5R79lx4 and you see why I don't do this for a dollar part.

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