Question about Dell OptiPlex GX270 PC Desktop

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Power Had a thermal event, changed out the heatsink and fan. When attempting to power up, the light goes amber for a split second, then goes off. ABCD lights are off. Motherboard light amber.

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Re: Power

Unfortunately, Dell have stopped replacing MB's for the 270 so if the caps on the motherboard are corroded or bulging, you will need to get this replaced. With these faulty MB's, this can also affect your RAM, HDD, and fans so check all of these are working ok, even if your MB looks ok.

Posted on May 06, 2008

Re: Power

GX270's have the well known capacitor leakage issue.
When your motherboard is affected, one of the sympthoms is this error: CPU shutdown due to thermal event.

Ask DELL for help. They use to replace mainboard with no questions.

In case you can't, you can ask a local TV repair shop to replace capacitors on your mainboard. They are available cheap on ebay.

Posted on Nov 05, 2007

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Re: Power

You might have to change your power supply..(ex:SMPS or ATX)

Posted on Oct 23, 2007

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Gateway gt5438 removed fan &heat shrink to clean, replaced now won't turn on.

When you removed the fan and heatsink (not heatshrink), did you remove the thermal paste from the bottom of the heatsink and the top of the processor? Also, when you reinstalled the fan and heatsink assembly, did you apply new thermal paste? If so, did you do so sparingly or did you gloop it all over the place? (This is one area in which more is definitely *not* better. You want to use the paste very sparingly as it is to help dissipate the heat and transfer it to the heatsink rather than try to be a heatsink itself.) Further, did you insure that you supported the motherboard from underneath when reattaching the fan and heatsink to insure that you did not crack the motherboard when locking it back down? Beyond this, did you reattach the fan power lead to the appropriate fan power plug on the motherboard?

Missing any of these details will potentially cause you problems and will cause the machine either to refuse to boot or to quickly go into a "thermal event" that causes a temperature-triggered shutdown so as to prevent damage to the machine. The caveat to this is that if you did not support the board when reinstalling and locking down the fan and heatsink assembly, then cracks in the motherboard could break power leads that would keep the machine from starting up. In that case, the only option you have is to buy a new motherboard.

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Will dried thermal paste make the fan run loud on a dell 4700?... when i power on, fan makes loud noise, black screen and wont boot and the power light led is amber (no blinking).. i changed the fan, tried...

You may try to remove the fan, clean it up. Also try to remove the processor heat sink (clean the thermal paste), reseat the processor, put a little thermal paste, that assemble it back. Before you do this, ground your self first(the easier way, hold any metal).

If this can't help,check the capacitor at your MoBo and if you found any unusual look like, it mean you need a new MoBo.

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I have a Dell precision 670 dual ZEON CPU ws and it has stopped working (Note after a move) diag lights ( on the front panel) A,B,C are lit and yellow, the power button is yellow instead of green and the...

Reseated? How Rick?

Did you;
1) Have the computer unplugged from power, and follow Anti-Static Precautions?
2) Did you clean the top of the processors, and bottom of the Heatsink's - Thoroughly, and properly apply new, fresh thermal paste?

[ If they had thermal pads on the Processors, remove them, throw them as far as you can.
One, they are JUNK. Two, you cannot reuse them.

The imprint has been made, and you cannot imprint over.

{The Heatsink, and Processor make an imprint on a thermal pad. The pad is squeezed down. You cannot re-squeeze again, and make a successful complete contact. A thermal pad also dries out a lot faster than thermal paste. Poor design ]

3) The LED lights you refer to are Diagnostic LED lights.

A, B, and C are Yellow.
The Power On LED light is Yellow,

Dell Support > Precision 470 and 670 Workstation Desktop PC Users Guide,

Solving Problems

Power Problems:

If The Power Light is Amber and Green or Steady Amber;
A device might be malfunctioning or incorrectly installed.
  • Remove and then reinstall the memory modules.
  • Remove and then reinstall any cards.
  • Remove and then reinstall the graphics card, if applicable.
Diagnostic Lights before P.O.S.T. (Power On Self Test)

A, B, C, are Yellow, D is blank or Off.
BIOS is not executing - Ensure that the Processor is seated correctly, and restart the computer.

Almost sounds like a problem with the motherboard voltage regulator circuit, if the Processors were handled with Anti-Static Precautions being observed, and new thermal paste being used, after proper cleaning.
{A Processor is the MOST susceptible computer hardware component to Static shock}

Motherboard Voltage Regulator Circuit
A series of Electrolytic Capacitors on the motherboard, (Yes, in a Series circuit, also), that among other duties, regulate voltage for the Processor/s.

Computer unplugged from power, Anti-Static Precautions observed, remove the motherboard, and visually inspect all 'caps' on the motherboard,

Post back as to your findings, in a Comment. (Believe upper right of your page, blue Comment)


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Dell XPS 200 Computer shuts off leaving blinking amber light

3 most common solutions to your problem are:
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  2. Bad heatsink/fan; processor heats up and will lock up your Pc
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Try opening the machine and give the inside a thorough cleaning, paying special attention to the heatsink and fan. Once clean and you've ensured the fan is operating, put it back together and see if your problem is fixed. If not, a new power supply will likely fix your problem. Best of luck.

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Thank You.

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Dimension 8400 will not boot, very loud fan.

I have a small business where I have worked on PCs for the past 14 years. I have had some of my clients that have brought me a few of these Dell 8400 to work on with the same problem. Will not boot and loop the start up, along with sounding like a leaf blower. After much trial and error i.e. Heat sink,cooling fan, power supply and motherboards. The first one I worked with by changing the heat sink, worked for about a week, then started doing the same thing. Replaced the Power supply with no results, same issue. Next was the Motherboard, still same issue. Last I pulled the processor out and found that the processor had over-heated and was damaged. In all I had well over $500.00 dollars invested and countless hours. Still the machine did not work, and still needed more work. Since this time I have had a few more of these machines cross my path. My suggestion is to scrap it and purchase a new PC. This is not one of Dell's better designs, and there is a tech issue from Dell related to this problem with the heatsink and the machine itself in the tech support on the Dell site. It states that they had a bad batch of heatsinks, but only replaced them under warranty.
Salvage what you can and build or have someone build you a clone.

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