Question about Computers & Internet

1 Answer

Psu died, replaced and now the computer won't boot properly

I have a p5w DH Deluxe mother board and my PSU went bad overnight. After replacing the PSU, the motherboard now powers up whenever i turn on the PSU, but doesn't actually boot. the power switch seems to be inhibited, as i cannot hold it in to power off the computer and the problem still occurs after i dissconnect the switch from it's pins. i am suspecting a problem with either the mother board or my processor and was caused by dirty power as my PSU died. i have a temperature sensor on my heatsink for my CPU and it actually measures a decrease in temperature when the fans are active, which leads me to believe that the CPU is not receiving any power. i need to find a way to check the MB and CPU without actually removing the CPU from the MB... my heatsink is kinda a pain to get on and off, and i can't afford to replace both on a whim... i need to know what is causing it before i can move forward. also, this PC is used for my business purposes, so i need it repaired quickly. thank you.

Posted by on

  • adalast Nov 21, 2008

    luckily my contractor decided to pay for the repairs, so i'm just replacing both the processor and motherboard for upgrades (lucky me). i will be looking over the motherboard after i get it out, as i can always place it into an older case i have laying around and just have a better computer at my fiance's place.

    the power supply went bad while the computer was on, so i'm pretty sure that it did damage to both of them. i have rarely seen a power supply go bad without baking the mother board as well, though if i cannot find any capacitors that have a problem i will definitely try flashing the bios... the worst that can happen is that i mess up the bios and the computer won't work, which is exactly what i have now, so no harm.

    thank you very much for the speedy answer, and i will be sure to put it to use once i get it out of the case.



1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

You might try clearing CMOS as it may have been corrupted.
Had a similar problem when I was testing alternate CPU were board is "auto configure". Worked well when stepped up, but not down and then didn't want to boot. I would be looking very closely at "ALL" the capacitors on the board for swollen or popped cap's possibly from previous power supply defect!
Just because it turns on doesn't meen it will work.

When you say your PSU went bad over night it's a bit speculative since the problem likely started sometime previous. The real question is now how much damage and did you visually inspect everything? If it was off prior to discovering the dead PS you likely don't have CPU damage. You may also have chassis intrusion detection which could also lock you out!

Power switch should be related to bios settings for standby power management options. You can in most cases preset for soft off. sleep mode, standby.

One other suggestion; you might make sure your power supply is sufficient power for the load of your system!

Hope the information helps though I specialize more in mechanical controls but make sure you have power supply unplugged and discharged before you start playing and exploring the board!

Posted on Nov 21, 2008


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Will not power up. Replaced bad power supply(burned circuit board inside PSU) but still does not power up, PSU is ok. When power on button is pushed CPU fan turns for about 1/2 second but nothing else....

Sounds to me like when the power supply went out it allowed a surge to hit the mother board and you will have to replace it also .Look at the mother board and see if there is a green LED light showing if it is you are getting power to it and you have capacitors blown if not recheck you connections from the power supply and MB if they are all tight and correct then just figure on replacing the mother board

Sep 01, 2011 | Biostar M7VKB Motherboard

1 Answer

I had a static discharge from my finger to the USB port on the front of my PC. The system locked up, so I turned it off and not it will not turn back on. The pc is one I put together and it has a ASUS P5W...

Test your PSU or replace it if your power supply units fan is not working your PSU is faulty

One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive

Test all leads that attach to your hard drive including electrical extensions,IDE,SATA

the leads from your "((motherboard to your hard drive))" make sure they have a secure connection and are not faulty or just replace them they could be faulty
make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they could be faulty a computer needs its connections to continue its cycle and have an end so any faulty leads will end up with a computer error hope this helps

May 08, 2011 | ASUS P5W DH Deluxe Motherboard

1 Answer

NO Post test beep.- no boot screen

Could be a dead PSU, mother board or CPU to me.

First check the power source, are all connections good and switches on.

Assuming so, are there any led's lit anywhere on the tower when you turn it on or any fans turning other than the PSU fan.

If there are no fans, including the PSU, then the PSU has failed, if there are fans and led's lit then turn it off, remove power source, remove the cover and check whether the PSU is properly connected to the mother board properly (Large multi-pin plug) if it is connected properly,

After this, you need proper test equipment.

Apr 15, 2011 | Gateway GM5094E PC Desktop

1 Answer


If you go to this homepage: DH Deluxe&SLanguage=en-us

You can download the driver for Vista but there is no option for win 7

Nov 14, 2010 | ASUS P5W DH Deluxe Motherboard

2 Answers

My computer wont turn on

take out the psu completely from the cpu/tower, plug in the power cord,if there is a switch on the psu turn it on, next locate the main power connector (24pin) and find green wire,take a piece of wire and insert it into the green wire connector,next touch the other end of the wire to the psu outer case or a black wire on the main connector,if all is well the psu will turn on,if you have a dc voltage tester check the voltages on the red and black wires on molex connector...5vdc,yellow and black...12vdc.if ok look at the main board and inspect the capacitors to see if they are swollen, if ok
replace psu and disconnect hdd,cd/dvd,floppy ect from main board only leave memory,processor and video, power on if ok shut off and reconnect hdd, power on, if ok shutoff and connect floppy, if ok power off and connect cd/dvd drive.during this testing you will know what is bad.let me know how it turns;

Feb 19, 2010 | Computers & Internet

1 Answer

Possible Bad CPU

RAM is more likely than the CPU. It could also possibly be a power supply. What are you getting as far as beeps during the POST?

Dec 19, 2009 | ASUS P5W DH Deluxe Digital Home Series -...

2 Answers

After psu burned out , can't boot computer with

see your cpu fan connector, weather it is connected properly. to check wether psu is working properly, short the black n green wires present in the psu's mother board connetor by using a single strand wire, and switch on. if the fan rotates there is no probs with the the psu. then u will have to replace the motherboard

Sep 04, 2009 | Gigabyte Computers & Internet

2 Answers

I have a emachine PC. PowerSupply blew up. changed it still down

try to remove the memory and put it back again make sure put it fit and correctly

May 28, 2009 | Intel D845EPI (INTELKD845EPILPAK10)...

1 Answer

Psu shut down





Jan 27, 2009 | Antec Solution SL400 Power Supply

Not finding what you are looking for?
Computers & Internet Logo

Related Topics:

650 people viewed this question

Ask a Question

Usually answered in minutes!

Top Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18425 Answers

Alun Cox

Level 3 Expert

2678 Answers

David Payne
David Payne

Level 3 Expert

14162 Answers

Are you a Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides