Question about HP Pavilion a450n PC Desktop

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No response from desk top computer when trying to turn it on.

Green light on the power supply keeps flashing, when I disconnect everything from the power supply the light stays on. I then started to connect things back together one at a time with the power off each time and the light will stay on until I connect the motherboard, then the light starts to flash again. I believe that the motherboard is probably damaged but could there still be something else going on. Did not have this problem until we lost the power the one day.

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I think your SMPS has gone bad. Get it checked from a qualified person

Posted on Dec 19, 2008

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I have a desk top computer and when i plug everything in the power button turns green and flickers on and off what is wrong and how can i fix it


This is on the AOC monitor?

If so, the power supply is likely failing. If the power supply is external, try a new one. Otherwise check to see if the monitor is still under warranty.

Jan 23, 2015 | AOC Computers & Internet

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Flashing green led light in back of tower


hi, okay you got to be careful here, it's sounds like the power supply has called it a day, disconnect from the mains take the side panel off and get sniffling can you smell a burn smell , no , now pull the power leads from the hard disk and DVD drive if fitted now removing anything that could cause a short on the board , turn it on, do you get video display ?


Please be careful of static shock and mains shock so only look inside once it disconnected from the mains.
Keep me updated please.


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I cannot stay connected to internet, my model 2701HG-B 2wire at&t dsl will start flashing red then disconnect me from the internet or my game site, how can i get this to stay fluently connected please!


You might want to try disconnecting everything EXCEPT the power cord. If you still get the red power light (it should stay there forever) then bring the gateway to Radio Shack or somewhere they have a 5 volt DC @ 2 amp power supply and plug it in for 5 to 10 minutes and see if the power light then stays green. If it stays green then all you need is a new power supply! If not, then the gateway is fried. Mine keeps going from a solid green power light to a flashing green power light and I can hear a relay click every 2 minutes at which time a pop-up say "ethernet line disconnected". I tried new power supply etc. to no avail! It is fried after 1.5 years! No more 2wire for me!

Sep 28, 2010 | 2wire 2700HG-B Router (2700HGB)

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My desk top will not turn on the green light at the back is on does not flash, if i try to turn on the pc the light in front will flashe yellow but the desktop will not turn on


Replace the power supply.
Apparently you are getting power to that, but it is not passing power to the motherboard.
If this does not work, I would suggest the following for troubleshooting:
Open the case and unplug everything but the memory (hard drive, CD, other cards)
Now try to start it. If it starts, it's probably the CD.
If, with only the CPU and memory plugged in, nothing happens, then it's probably the power supply.
The next step would be to replace the motherboard.

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I have an HP Pavilion a384x. It will not turn on


First with the computer turned off make sure the switch on the power supply is set to 115v.

If you turn the computer back on and you still get a flashing green light on the back of the power supply and a constant light on the front of the computer with no video, then try replacing the power supply with either a new one or a known working good one.

If that doesn't do it then it has to be the motherboard at that point.

Keep in mind normally on those power supplies, the green light should be constant. So it has to be either the power supply is bad or the moterboard is bad and you'll know when you put a new or known good working power supply in the computer.



Aug 03, 2009 | HP Computers & Internet

1 Answer

Computer wont turn back on after power outage


Try unplugging the cord from the back of the computer for about 5 minutes and then try it again

Apr 14, 2009 | Compaq Computers & Internet

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Monitor Will not come on


bad capacitors inside the monitor they need to be replaced, or if the power light is blinking then there are transistors that need replacement

Mar 22, 2009 | Dell E198FP LCD Monitor

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On my desk-top presario


HP/Compaq has had alot of power supply issues with this series of computers. Do you have another power supply you can try in this system? If the light is flashing rapidly, it is usually a power supply. Fairly cheap and easy to replace.

Jan 26, 2009 | Compaq Presario SR1050NX (DW257A) PC...

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Flashing Green Light on Power BESTEC Power Supply


This is an easy fix so here you go nice and simple:

Problem: Your motherboard circuit has been cut.

Causes: Power disconnected during operation. Power outage or short in the surge protector.

Symptoms: Flashing green light on both motherboard and power supply. System will not power on.

Solution:

Step 1: Ensure that both the power supply and the motherboard lights are flashing green, not solid or off.
Step 2: While the power is on, disconnect the power supply from the motherboard. This connection is the largest of the connections and should be listed as the 'P1' or 'Primary' power connection.

Step 3: Wait until the green light on the motherboard stops flashing and check to ensure that the green light on the power supply is now solid. If it is not solid, disconnect the power to the power supply and wait until the light turns off completely. Then reconnect, it should be solid now.

Step 4: While the power is on, reconnect the P1 connection to the motherboard and you should now see that the light on the motherboard is solid.

Step 5: Power on your PC. The problem should not persist.

Warnings: If the power supply light remains flashing after you have restored power to it while it is disconnected from the motherboard, it may be a system failure in the power supply itself requiring replacement. Always be careful when working with an active or live power machine.

I hope this helped! Good luck!

Jun 23, 2008 | Bestec (ATX-250-12E) 250-Watt Power Supply

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