Question about FSP HP Pavilion s3500f Power Supply Upgrade FSP200-50PLA2-SL

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I have installed a new power supply (upgraded from 160 to 250W). Now the computer comes on, then the fan speeds up and then everything cuts off

Before installing the new power supply the computer wouldn't come on. Now it comes on, runs for a few, speeds up then cuts off

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1) Computer clean inside? Especially processor fan, and finned Heatsink? [FOLLOW Anti-Static Precautions ]

Dust, dirt, hair, food crumbs, lint, etc, on the bottom of the motherboard? You have to remove the motherboard to see.

2) Thermal Paste on top of Processor dried up?
Thermal Pad? Peel off, THOROUGHLY clean, apply fresh new Thermal Paste - Properly

3) Are the Electrolytic Capacitors in good shape, or bad; on the motherboard?

http://capacitorlab.com/visible-failures/index.htm

4) All cables plugged in, to include power cables; and if you have an Intel processor, especially this power cable,

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

5) Remove all Ram Memory module/s ('Stick'), and replace. It's easy to bump one loose, and you can't tell by eye.
You have to remove/reinstall to be sure.

Need more specific info? I need the computer name, and model number, (Back of computer next to Windows product key; or up on side of computer tower) Or the motherboard manufacturer name, and model number. Post back in a Comment.

Regards,
joecoolvette

Posted on Nov 27, 2012

  • Arnold Hence Nov 28, 2012

    Thanks very much. Looks like it was the heat sink compound. Once I cleaned that all off, added new compound and tightened everything down it worked just fine. I also found a loose grey wire in the 24 pin adapter cable that was causing the computer not to boot up from time to time. Thanks again

  • joecoolvette
    joecoolvette Nov 29, 2012

    Excellent, glad you found the problem! Thank you for the rating!

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Try to update the BIOS with the old CPU in, if not the new CPU could be faulty, yes I know it's new but it is entirely possible

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I have an hp pavilion a6403w desktop. I have upgraded the stock ram to 4 GB crucial, and have installed a Galaxy 9500 GT vid card. Everything else on the system is entirely stock. After a Windows update,...


Wait a minute! Hold the phone here.

You made three major changes here.

1) The Windows update. You have to watch what Microsoft put's in their updates. Manually install the update/s, and look at each one before you install, don't use the automatic feature.

With all of the cr@p out there, Windows updates include a lot of security add-on's.
Some of these can bring a computer to it's knees.
Some updates have 'bugs', and guess who is the one who gets to test it?
Yep, the user.

Install one update at a time, so if something happens to your computer, you'll know which one it was, and can delete it.

2) New Ram Memory, and 4GB's.
Who knows if you got a bad stick from Crucial, and even if the stuff is correct?

Did you pick up DDR2 Sdram at 800Megahertz?
(PC6400)
Each stick can use up to 5 Watts.

Has to use 1.8 Volts, be Low Density, Unbuffered, and Non-ECC.
CAS Latency (CL) around 6.

Still doesn't mean the factory, couldn't have sent Crucial some bad ram.
Happens.

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The Nvidia 9500GT requires a Power Supply with at least 350 Watts, and the 12 Volt power rail should have at least 18 Amps.

The Pavilion a6403w comes with a generic 300 Watt power supply.
Actual wattage for this baby is more like 70 percent of the maximum stated Wattage.
210 Watts.
Probably 12 Amps on the 12 Volt power rail.

Doesn't mean the graphics card itself needs 350 Watts.
The Wattage is based upon a test computer unit.

[The test unit will have a powerful Processor, (Core2 Duo, or Quad, probably), maxed out with 4GB's of ram, an average motherboard, plus two optical drives, two computer case fans, and a Processor fan]

But if you're still running that generic old Power Supply that came with the computer, this ain't gonna cut the mustard.

I would go back to the old ram, remove the graphics card, and use the Integrated Graphics.

(Plug the monitor back into the motherboard VGA connector, {Blue}, or the DVI connector, {White} Whichever one you were using originally)

[You are following Anti-Static Precautions, correct?]

Computer unplugged from power, press the Power On button in, and hold it in.
Hold it in for a count of 5 Seconds.
(Count, 1001, 1002, 1003, 1004, 1005)

Let go of the Power on button.
Do this procedure two more times.
What you are doing is clearing CMOS Error Codes, and resetting BIOS back to the factory default settings.

Let's get this computer working again, and install Windows 7.
Then come back, and install ONE stick of ram at a time.

A pain I know, but you need to see if there may be a bad stick of ram, and if the ram is compatible, before you go on.
(NO old ram installed)

When installing just one stick, make SURE it is installed in Slot 1.
That is the ram memory slot that is closest to the Processor.
(May have DIMM 1 printed on the motherboard, next to Slot 1)

Computer works with 2GB in Slot 1?
Computer off, unplugged from power, Anti-Static Precautions taken, install the other 2GB in Slot 2.

Everything works so far?
Install the Nvidia graphics card.
(Doesn't matter WHO makes it. It's still has an Nvidia GPU chipset on it)

BE SURE to put THE Drivers in the computer first, THEN the graphics card.
Windows operating, put the installation CD that comes with the 9500GT in the optical drive.
Install the software.

Then computer unplugged from power, Anti-Static Precautions taken, install the graphics card. Plug the monitor into the graphics card.
(Hey, don't laugh! Sometimes we computer geeks get in a hurry! lol!)

When you go to install Windows 7, do you have the first boot device in Boot options, in BIOS Setup, set to CDROM?

Would like to 'hear' how this comes out, and am here for questions.
Post in a Comment.

[ What I 'see' so far is an underpowered Power Supply.
I thought at first it was a Vista problem, and it may be.
Vista, and the Windows update.
With a new harddrive, and Windows 7, Vista shouldn't be an issue anymore.

There is one more hardware issue. Could be bad Electrolytic Capacitors used on the motherboard.
Specifically the one's used in the motherboard Voltage Regulator Circuit, but I'll reserve judgment on that, after you have posted your findings.

A) http://www.capacitorlab.com/visible-failures/index.htm

B) http://www.hardwaresecrets.com/article/616

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